Splitted the tests for counters from sequentials. Updated travis.yml
Included set reset functionality in flip flops
Added 2 more counters
Added tests and examples for the 2 new counters
PEP8 - Core files
PEP8 Algorithms Folder
PEP8 - Combinational folder
PEP8 - dev folder
PEP8 - Examples Folder
PEP8 - Gates Folder
PEP8 - ic folder
PEP8 - Operations folder
PEP8 - Sequential/__init__.py
PEP8 - Shell folder
PEP8 - Tests folder
PEP8 - Tools folder
Merge pull request #133 from rvraghav93/counters_and_pep8

Added 2 More Counters and Made the entire code base PEP8 compliant