- support ruby C-API reference
- rb_funcall() is not shown with -c (must ignore #ifdef to fix)
- --parser=rdpja
- (rubyrefmparser.rb) support method list
- support standard library documents
- abandon Marshal
- class document
- support constants (Ruby Reference Manual /ja)
- support pack/unpack template (Ruby Reference Manual /ja)
- support sprintf format (Ruby Reference Manual /ja)
* support RDoc
* flat
* parsing arbitary ruby script and register methods
