Renamed CmdStore.packs -> CmdStore.pack_keys.
Renamed CmdStore.cmds -> CmdStore.cmd_keys.
Renamed a lot of things in otto/cmdstore.py for clarity/continuity.
@bugfix Missed a few variables during last refactor.
Added comments for clarification in CmdStore._load_cmd().

Conflicts:
	otto/cmdstore.py
Docs and renames.
Removed unused subfunction in New.
Refactors and docstring updates.
Made base:dr search for local packs other than 'local'.
Added basic tests for CmdStore.
Added test for CmdStore._load_cmd()
CmdStore._load_cmd() should bail when cmd isn't in module.
More tests for CmdStore.
CmdStore._load_cmd() didn't need pack_name as a param.
More tests for CmdStore.
Bumped version to v0.7.