Support error handling.
Close #11
Fix Lua grammar file. Fix Antlr4 parsers to use visitor.
Merge branch 'master' of github.com:exKAZUu/Code2Xml

Conflicts:
	Code2Xml.Languages.ANTLRv3.Tests/JavaProcessorTest.cs
	Code2Xml.Languages.ANTLRv4.Tests/Processors/JavaProcessorTest.cs
	Code2Xml.Languages.ANTLRv4/Processors/Lua/LuaProcessor.cs
Use visitor instead of listener.
Enhance error handling. Fix Lua parser. Fix parsers with Antlr3.
Separate test fixture into another project.
Change project structure.
Change directory structure.
Enhance parsers using Antlr3.
Update ParserTests.
Fix obsolete parsers.
Update ParserTests.
Fix parsers using Antlr3.
Release 2.0.0.74.
Add a new object manager instead of PluginManager class.
Add a new object mangaer. Add Obsolete attribute to old classes.
Update README.md
Update README.md
Update README.md
Update README.md