Merge pull request #62 from ptnapoleon/python-driver

Python driver
Corrected merge error
Edited imports. Closes #65
Converted auth_test to use pydriver
Ported delete_insert to pydriver
Ported cqlsh to pydriver
Ported deletion_test to pydriver
Ported global_row to pydriver
Ported multidc_putget to pydriver
Ported putget_test to pydriver. range not working
Ported range_ghost to pydriver
Removed unused imports from range_ghost
Ported repair_compaction to pydriver
Ported repair to pydriver
Ported replace_address to pydriver
Corrected exception title in comments
Ported schema to pydriver
Ported snapshot to pydriver
Added replace_in_file to pytools
Ported sstable_generation to pydriver