Renaming memInfo() to getMemInfo() to be consistent

Signed-off-by: Jake Hunsaker <jhunsake@redhat.com>
Adding crashkernel path statistics and expanding filesys module

Added getFsDev() to filesys to be able to probe the device for a given fs/mountpoint.

Added functions to check the free space in the path for a crash dump and checking against required space for one.

Signed-off-by: Jake Hunsaker <jhunsake@redhat.com>