Move repl out of global namespace
Move command_edit out of BEFORE_PLUGIN
Prevent #edit in edited file from triggering edit action
Add #redit command (to re-edit the previous file)
Document #redit command
Move dont_allow_edit_in_file into anonymous sub

Don't pollute method list too much
Don't repeat #redit commands either
Don't care if we don't document our command_* methods
Update README
Update changelog
v0.02

     - Allow editing of custom file names (thanks Vytas Dauksa for the code!)
     - Prevent using #edit within the editor (GH #1, thanks Vytas Dauksa for the report!)
     - Allow re-opening previously edited file (GH #2, thanks Vytas Dauksa for the report!)