Allow to skip -i option when inside a repo directory
Allow to skip -i option when inside a repo directory

When inside any DM repo directory, leaving out a
directory to include means the task will operate
on the repo residing in the current working
directory only.

Example:

  export DM_DEV_ROOT=/path/to/dm/dev/root
  cd $DM_DEV_ROOT/dm-validations
  thor dm:sync

will only sync dm-validations. All the other thor
tasks work the same.
snusnu/testor