Merge pull request #5 from vaibhavbansal/master

Cache class timeout expiry and GithubManager green thread
Minor change to .gitignore to ignore conf file, lest I check in my credentials
Adding a class for dictionary-based caching
Adding timeouts for the Dictionary based cache
Fixing tests
Merge pull request #6 from vineethtw/dict_cache

Introduced a dictionary based cache
Added RedisBackingStore and FileSystemBackingStore