Update dependencies, make them less tight
Update Gemfile source line to full URL
Lock version of locale needed by gettext 2.1

The 2.0 series of locale provides an implementation of memoizable needed
by gettext, but gettext doesn't version its dependency on locale.
Add needed gtk2 dependency to Gemfile
Make hpricot and htmlentities required deps
Fix syntax error
Find shared data relative to current lib

- Move data/ to share/ in development environment
- Find share/ directory relative to lib/ in configuration
- Do not create configuration during install
Remove old .cvsignore files
Add GStreamer dependency to Gemfile
Don't require goocanvas

The goocanvas gem won't install with goocanvas3, and goocanvas itself is
no longer maintained. Another solution will have to be found.
Fix data version assertions
Make pry availabe during tests
Fix and simplify load_rows_from_csv test helper
Remove header row before comparing csv
Update Copyright header
Remove debugging statement
Fix rspec-mocks deprecation warnings