Fixed get_largest_partition_size() showing WARNING message.

Do not show warning for NotEnoughFreeSpace return code, it's not any
error condition, the disk is just full.


Resolves: ticket #218
Add partition table type to 'lmi partition-table list'.
Remove debug print.
Unify storage command descriptions.
Add option descriptions to storage commands.

All commands should have description of all arguments in its help,
nobody seems to read documentation.
Show file system names in lower case.
Fixed alignment of tables with utf-8 characters.

For example, 'lmi storage tree' output had wrongly aligned columns, when they
contained utf-8 graphics.
Add [device] option to 'lmi mount show' and 'list'.
Show better error message when mount fails.
Rename 'lf' command to 'file'.

'lf' is not intuitive, it does not say anything to CIM newbies.
Fixed RAID tests.

- the RAID might be rebuilding when we query its status
- the RAID should not exists when we remove it
Merge pull request #34 from jsafrane/devel/testday-fixes

Fixes for tiny bugs we discovered during a test day.