Ignore .pyc files
Updated README
Removed tests file
Added hmac-sha1 signature
Fixed all PEP errors
Signature fully working, updated readme
Merge branch 'signature'

# By Felipe (4) and Felipe Martin (2)
* signature:
  Signature fully working, updated readme
  Fixed all PEP errors
  Added hmac-sha1 signature
  Removed tests file
  Updated README
  Ignore .pyc files