Fixed #54: Updated to most recent version of tomphp/patch-builder.

Thanks to @tomphp for fixing.
Break EditingSession down into individual editing action classes.
Merge pull request #48 from tomphp/refactor/editing-actions

Start breaking EditingSession down into EditingActions
Rename local variables does not corrupt other variables starting with the variable name being changed
Merge branch 'fix/rename-local-variable' of github.com:tomphp/php-refactoring-browser into fix/rename-local-variable