1) added redis capability to handle different databases even on the same host. 2) redis lists that are plain strings are converted back into python types
added a newline at the end of the file
conversion from python lists to tuples in redis to allow hashing
added some py.test tests
Multiple insertions of the same key-value pairs are prevented. This is accomplished using python built-in sets and redis sets
Merge pull request #1 from simonemainardi/master

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