Adds Native Brightscript Component Types and Custom Components (Nodes) to Type System

[markwpearce]

Additions:

• All native Brightscript Components (eg. roDeviceInfo, roBitmap, roDateTime, etc.) as types usable in Brighterscript, including completions on methods and documentation
• Same for native interfaces (ifDraw2d, ifAppManager, etc)
• Same for native events (roInputEvent, roSGNodeEvent)
• Adds AssociativeArrayType that can be built from an AA literal (eg. myAA = {name: "Mark", coolFactor: 100}, and will correctly be compatible with interface types that have declared the same members, eg:

interface Developer
   name as string
   coolFactor as integer
end interface

sub takesDeveloper(dev as Developer)
     print dev
end sub

sub foo()
     takesDeveloper({name: "Mark", coolFactor: 100}) ' no validation error, because AA meets required interface
end sub

• Adds Scenegraph nodes to type system. The type's name is the component's name prefixed with roSGNode ... so roSGNodePoster, roSGNodeRowList, roSGNodeStdDlgTextItem are all available as types (with completions, documentation, etc)

• Custom components are also added (again, prefixed with roSgNode). Eg:

<?xml version="1.0" encoding="utf-8" ?>
<component name="Widget" extends="Group">
    <interface>
        <field id="alpha" type="assocArray" />
        <field id="beta" type="float" />
        <field id="charlie" type="nodeArray" />
    </interface>
</component>

will create a type in the type system with name roSGNodeWidget, with completions and type inferences for properties alpha, beta, charlie, as well as validation on methods like 'getChildren(), subType(), etc.

NOTE: CallFunc's are a pain, because they cross scope boundaries. More work needs to be done to fully support callFuncs with validation and return type inference

[TwitchBronBron]

This looks awesome! Just a few comments and then this is good to go.

[TwitchBronBron]

Looks good to me