DEVEL. Now generates separate class nodes w/ visitor pattern.

This is a checkpoint commit, but the contents of this commit are
unusable. Further development is necessary for the feature to work
fully.
Tweaked generated parsers, added example visitor implementation
Switched to a different naming convention so class names are capitalized
Added next stage in bootstrap, this version implements visitor pattern
Changed main directory naming scheme, updated bootstrap
Updated imports to reflect new naming scheme
Updated Makefile. Do note that bootstrap/ is used for previous iters
Made the parser generator generate a boilerplate visitor.d file
Made rule func names lower camelcase even if rule name is upper camelcase
Only generate visitor.d boilerplate file if one doesn't already exist
Changed semantics of visitor file generation. Generates visitorAUTO.d
Merge branch 'visitor'

Conflicts:
	parserGenerator3.d