Add numeric indexer to HTMLElementCollection
Merge pull request #609 from Microsoft/HTMLElementIndexer

Add numeric indexer to HTMLElementCollection
Properly report errors for failed type assertions
Fix incremental parsing bug due to non invalidating cached data in nodes.
Merge pull request #620 from Microsoft/incrementalParsingBug

Fix incremental parsing bug due to non invalidating cached data in nodes...
Merge pull request #618 from Microsoft/typeAssertionErrors

Properly report errors for failed type assertions
Corrected codegen to support shadowed module names.
Fixing a few issues in Language Specification
Merge pull request #624 from Microsoft/updateLangSpec

Fixing a few issues in Language Specification
Merge pull request #623 from Microsoft/shadowedModuleNames

Corrected codegen to support shadowed module names.
Merge branch 'master' into noImplicitAnyOnCast

Conflicts:
	src/compiler/checker.ts
	tests/baselines/reference/arrayCast.errors.txt
	tests/baselines/reference/contextualTyping39.errors.txt
	tests/baselines/reference/contextualTyping41.errors.txt
	tests/baselines/reference/fuzzy.errors.txt
	tests/baselines/reference/genericTypeAssertions2.errors.txt
	tests/baselines/reference/genericTypeAssertions4.errors.txt
	tests/baselines/reference/genericTypeAssertions5.errors.txt
	tests/baselines/reference/intTypeCheck.errors.txt
	tests/baselines/reference/typeAssertions.errors.txt
fix typo