Added a very basic graph dumper for #5. Right now, only dumps graphs into GEXF format.
Added adaptive retrieval stub for integration described in #5
Solved the issue when os.makedirs(.., exist_ok=True) and mode differs from expected. Adaptive retrieval process is now called from main script.
Changed the verb 'fetch' for 'start'. Consistency with stop :)
Finished the Twitter retrieval process class. Minor bugs also fixed.
Merge pull request #11 from jmcotelo/M2

M2 Closing Issue #5