Separate classes to each autoload script

[tyru]

trafficstars

vimlparser has RegexpParser, but it's experimental class object. And autoload/vimlparser.vim has 6000+ lines of code. The each class should be moved to each autoload script.

• Keep vimlparser#import() to load all autoload files for compatibility
• User should be able to import and use each class by more modularized way

[tyru]

experimental class

Another checker class like #105