[TIMOB-17924] Enable JAVASCRIPT_DEBUGGER expliitly
[TIMOB-18089] JSType->TiType

Hyper loop has symbol conflicts since it imports the JavaScripCore
framework and there is a definition of JSType
Update .gitignore
Merge pull request #16 from vishalduggal/timob-17924

[TIMOB-17924][TIMOB-18089] JavaScriptCore changes
Merge branch 'v20' of github.com:appcelerator/tijscore into v20-debugger

Conflicts:
	JavaScriptCore-iOS.xcconfig