Make parser more lenient with what it allows as the body of a function.

Conflicts:
	src/services/syntax/SyntaxGenerator.js.map
Rename 'block' to 'body'.

Conflicts:
	src/services/syntax/SyntaxGenerator.js.map
Merge pull request #1248 from Microsoft/parserLeniency

Make the parser more lenient when it encounters errant => tokens.