Resource managers dont't overload type

The _clusto_driver attribute is already unique per driver, while
_clusto_type should be more generic. In this case all resource managers
share the same _clusto_type except for the IP Manager, but I think that
shouldn't be the case.
Cleanup reboot command, add --batch option to disable confirmation
prompt, --method option to pass a string to reboot()
Don't hide full tracebacks for clusto commands, it makes debugging
difficult
Dropping travis support for 2.6

Because 2.7 is been around for quite some time now, and ipython requires it now.
Log traceback as debug
Log tracebacks with newlines
Merge pull request #45 from JeremyGrosser/command_tracebacks

Don't hide full tracebacks for clusto commands, it makes debugging
Merge pull request #44 from JeremyGrosser/cleanup_reboot

Cleanup reboot command, add --batch option to disable confirmation
Filter by pool
Speed up contents lookup
Turn off debugging
Fix bad in_ clause
Remove content_attrs filter for pool
Remove trailing whitespace
Remove more trailing whitespace
Modify contents() to batch up 500 rows at a time
Add tests for clusto.util
Fixed a bug due to bad linting
Change ValueError to AssertionError
Merge pull request #46 from sloppyfocus/speed_up_stuff

Speed up stuff