Remove download_url from setup.py

Github stopped providing download hosting, and it was
decided on the user ML that there's no need to set
download_url at all -- the normal pypi tarball will
suffice:
https://groups.google.com/forum/?fromgroups#!topic/pycassa-discuss/oQ_l_coZDFg
fix example code in Getting a ColumnFamily

the "pycassa" module is neither imported nor needed
Merge pull request #192 from termie/master

fix example code in Getting a ColumnFamily
adding column start and end to get for non-composite keys
adding column_start and column_finish to multiget
updating stubs.rst
Merge pull request #195 from david-huber/master

Add column_start and column_finish support to pycassa.contrib.stubs.ColumnFamilyStub
Added include_ttl parameter so that column TTL's are returned as well. It can work alongside include_timestamp.
adding support for column_count.  ColumnFamilyStub.get needs to sort columns before slicing them.  Insert order doesn't matter, so changing the dict object used.
updating stubs docs
adding support for column_reversed
Merge pull request #198 from david-huber/master

Adding column_count and column_reversed support to ColumnFamilyStub.get and ColumnFamityStub.multiget
Merge pull request #197 from edevil/master

Add "include_ttl" parameter that allows column TTL's to be returned as well
Bump version to 1.9.0, update changelog
Accurate docstring for gm_timestamp

Fixes #202
When a connection is recycled, and the pool is full, the old connection would be disposed twice.
This would happen because the Queue.Full exception would be raised, and so "conn"" would be the old connection that has already been disposed. This connection would again be disposed due to the Full exception.
Merge pull request #205 from edevil/DisposeRecycled

When a connection is recycled, and the pool is full, the old connection would be disposed twice.
Use temporary Travis workaround for C*
Handle empty strings for IntegerType values

Fixes #206