Add improved ANTLR lexer adapter
Use the new lexer adapter implementation, greatly simplifying code
Refactor applyLexerState
If no current state is available, assume initial state
Make the operand of getLexerState clear by adding a parameter
Updated documentation for lexer classes
ANTLRv4Lexer requires tracking _ruleType as an additional state variable
Merge pull request #11 from sharwell/lexers

Lexer updates
rm snapshot to pull ANTLR 4.2 lib
Tool error mgr didn't have format set; i set to default of "antlr". Fixes #13
Simplified and generalized parsing stage
PsiElement construction for AST nodes without reflection
Use singleton instance directly instead of looking up a registration
Use inherited JDK from project
Remove obsolete code generation support
Merge pull request #14 from sharwell/parsing

Parsing updates
Add initial color settings page for ANTLR
Remove unnecessary class ANTLRv4TokenTypeAdaptor
SyntaxHighlighterColors is deprecated
Fixed keyword highlighting