Iconv was replaced by String#encode
Be more liberal about how formats are detected.
Use duck-typing to decide whether to extend string.
Use our old Excelx::FORMATS hash to spec out the new implementation. Support some (mildly dubious) exceptions for backwards compatibility.
Delete empty useless roo binary.
Version bump to 0.0.0
Switch from bones to jeweler for easier releases, and do some minor reorganization.
Ignore rbenv's .ruby-version
Add a rake test task to complement jeweler.
Merge remote-tracking branch 'Xaver/master' into releasee

https://github.com/Empact/roo/pull/19
Don't require rubygems or ruby 1.8.
Bump to 1.11.0, requiring ruby 1.9.0+