Update: allow another round of updates
Fix: dep handling

 * ensure we deal with strings
 * ensure we actually generate require (F me)
 * ensure array of packages is present
Refactor: require > composerRequire
Enhancement: allow and force updates
Fix: let the code handle PEAR_Exception require

Don't add this as a dependency if it's not required.
Update: move prefix generation
Enhancement: handle errors so execution doesn't break
Refactor: move to symfony\console
Refactor: setUp method to do set-up work
Enhancement: new command to mass-merge PRs