adding MaximumScaleX

* 'master' of https://github.com/noais/ios-charts:
  adding MaximumScaleX
  Repeated line removed from example

* commit 'bf7d7ff729c417b414059933c8b44b877e365743':
  Update README.md
  be explicit on how to install 'Charts' when using CocoaPods since there is another Pod called 'ios-charts'

there is another Pod called 'ios-charts'

adding MaximumScaleX

# By Daniel Cohen Gindi (1) and david ferreira (1)
# Via david ferreira
* 'master' of https://github.com/noais/ios-charts:
  Bug fix setMaximumScaleY should be setMaximumScaleX
  Update README.md

* Daniel: (33 commits)
  Fix possible Index Out Of Bounds error
  Demo updates according to Android counterpart
  Fixed PieChart "chartValueNothingSelected" not firing when clicking outside of the chart
  Fixed a typo "hightlight"
  Fix disappearing line when zooming into LineChart
  Docs updates
  Some refactoring to axis limit line renderings
  Fixed demo to call setMaximumScaleX (Closes #418)
  Stop consequent calls to animate on different axis from interfering (Fixes #456)
  Tuned code styling
  Added Carthage support (Closes #217)
  Bumped to 2.1.4a
  Improvements to highlight animation phase applying
  Fix highlight arrow animation phaseY
  Fix highlight animation bug in stacked bar chart (Fixes #349)
  Fixed `copyWithZone` for latest Swift 2.0 changes (Fixes #410)
  Reduce to nil check only (Fixes #417)
  Avoid trying to draw cubic fill when there's no points (Fixes #419)
  Fix drawing of scatter custom shapes (Fixes #423)
  Removed CALayer extensions, as they are causing too much confusion
  ...

* commit '3f88894f31683888862cf14312db74b05c1a0101': (84 commits)
  Bar chart tests
  Make getBarBounds callable from Objective-C code (Fixes #570)
  round the float value before we cast to Int
  Update README.md
  Bumped to 2.1.6
  Fixed possible out-of-bounds exception when no ranges are present
  fix Scroll issue when the graph is in a UITableView
  Fixed (again...) the highlight vs. drag issue (Closes #520, closes #521)
  Update README.md
  Updated test snapshots for latest x-axis label offset changes
  A comment on how to record in tests
  Removed extraneous "y" (#512)
  Carthage folders should be ignored
  Implemented support for rotated labels on the x-axis
  Support for customizing description text position (Fixed #512)
  Match code styling to new-line brackets
  Adds test support without cocoapods
  Fixed conditions for hasNoDragOffset (Fixes #499, fixes #498)
  update targets to build framework with same name
  Fixed drag offset panning bug
  ...

* master: (51 commits)
  Bar chart tests
  Make getBarBounds callable from Objective-C code (Fixes #570)
  round the float value before we cast to Int
  Update README.md
  Bumped to 2.1.6
  Fixed possible out-of-bounds exception when no ranges are present
  fix Scroll issue when the graph is in a UITableView
  Fixed (again...) the highlight vs. drag issue (Closes #520, closes #521)
  Update README.md
  Updated test snapshots for latest x-axis label offset changes
  A comment on how to record in tests
  Removed extraneous "y" (#512)
  Carthage folders should be ignored
  Implemented support for rotated labels on the x-axis
  Support for customizing description text position (Fixed #512)
  Match code styling to new-line brackets
  Adds test support without cocoapods
  Fixed conditions for hasNoDragOffset (Fixes #499, fixes #498)
  update targets to build framework with same name
  Fixed drag offset panning bug
  ...

* commit 'cbe0bac08b0f7a2df43dc38e921c4609f29e3450':
  enable code coverage
  update tests to make more logical sense
  update carthage bootstrap action
  add ci file and script to run tests
  add missing images for bar chart tests
  Use nil coalescing in ChartDataSet's entryCount (Fixes #631)
  calcYValueSum should not be ABS (Fixes #604)
  Prevent the matrix from reaching invalid values (#417, #607, #577, #582)
  Removed ambiguity of _dataNotSet (Fixes #585)
  Fixed pie-chart highlight position while animating on X
  Allow setting the max pie-chart angle
  Remove useless parentheses causing swift build error - "Expression was too complex to be solved in reasonable time"
  Added automatically generated change log file
  add initialize dataSets in setter

* master:
  enable code coverage
  update tests to make more logical sense
  update carthage bootstrap action
  add ci file and script to run tests
  add missing images for bar chart tests
  Use nil coalescing in ChartDataSet's entryCount (Fixes #631)
  calcYValueSum should not be ABS (Fixes #604)
  Prevent the matrix from reaching invalid values (#417, #607, #577, #582)
  Removed ambiguity of _dataNotSet (Fixes #585)
  Fixed pie-chart highlight position while animating on X
  Allow setting the max pie-chart angle
  Remove useless parentheses causing swift build error - "Expression was too complex to be solved in reasonable time"
  Added automatically generated change log file
  add initialize dataSets in setter