Update character_class_spec.rb

Use a Regexp compatible with Ruby1.8.
This would solve https://github.com/nathansobo/treetop/issues/32.
Add manpage for tt binary

Debian distribution requires packages in /usr/bin to have a manual page.
This is a manpage written by Carl Worth, and slightly updated by myself
for the Debian project.
Merge pull request #37 from boutil/master

Consider adding a manpage for tt tool.
Merge pull request #36 from boutil/patch-1

Use a Regexp compatible with Ruby1.8.
Merge branch 'master' of github.com:nathansobo/treetop