A silly Ruby gem for modifying the version number of a project from the shell.
gem install versionifier
/home/your_project$ v+ 0.1.0 In your_project (0.0.3) - Version number updated to (0.1.3)
Versionifier assumes that the project name is the same as the folder you are working on, and that you're using the gem folder setup shipped default by the Bundler gem generator.
Which is the same as saying that assumes that your version file will be located in:
Copyright 2011 Xavier Via