Revert "move aliasing error to its own handler"

This reverts commit 3686770bc6543548a987051379ee01324fb37939.

Conflicts:
	custodian/vasp/handlers.py
Revert "move aliasing error to its own handler"

This reverts commit 3686770bc6543548a987051379ee01324fb37939.

Conflicts:
	custodian/vasp/handlers.py
Add distribute to gitignore.