Add destdir option.
Add input validation for destdir, srcdir and files.
Fix small logic error where directories weren't being checked properly.
Move the movies instead of just printing their locations.
Use mvmv.movemovies properly.

- Movify mvmv.movemovies to take in an excludes flag.
Make print statements python2 compatible.
Downloading movies is also py 2/3 compatible.
Merge pull request #23 from pbhandari/feature/cli

Add support for destdir option.