feat(chips): use MdAutocomplete, MdChipList and MdBasicChip + bugfixes + a11y. (closes #215) (closes #165) (closes #96)

[emoralesb05]

Description

#215
#165
#96

Since now we are using MdAutocomplete under the covers, TdChips will follow the material spec better and wont have the cross-browser issues that datalist had.

What's included?

• feat(chips): remove TdAutocompleteComponent and use MdAutocomplete
• feat(chips): remove TdChipComponent and leverage md-chip-list and md-basic-chip
• feat(chips): filter items depending on input value for autocomplete
• enhancement(chips): change input label when incorrect + remove warn when value changes
• feat(chips): add better a11y to td-chips

Test Steps

• ng serve
• go to http://localhost:4200/#/components/chips
• compare with https://teradata.github.io/covalent/#/components/chips
• See it be more materialy 😄

General Tests for Every PR

• ng serve --aot still works.
• npm run lint passes.
• npm test passes and code coverage is not lower.
• npm run build still works.

Screenshots or link to CodePen/Plunker/JSfiddle

[kyleledbetter]

Twould be a lovely a11y feature to enable backspace to remove a chip and <- and -> arrow chip selection like ng1:

(also esc goes back to the input no matter which chip is selected)