Various standardization to the proposed gce_storage module to bring things in line with updates to the S3 module.
Some typo fixes.

Further testing required.

dest in s3 module does not work with ~username notation for home directories.  Wrapped dest definition in os.path.expanduser() which will return the expanded path in case of successful tilde expansion and otherwise the original value

No idea if I'm rebasing properly or not.  This is my first attempt.

Adds some additional docs about the module parameters for s3
and ec2 modules.

  Migrated all examples: in DOCUMENTATION=''' string to standalone EXAMPLES=''' string
  Added deprecation warning to moduledev.rst and remove deprecated example from it
  Fixed up a few typos and uppercased some acronyms.
  add consistency to how EXAMPLES are formatted

to indicate that remote file should be overwritten if a file with the
same filename exists.