Fixed pymssql version detection for pip 1.4.x. refs #2529
Fixed version detection in setup.
Revert back due to Cython dep which is not found on Pypi.
Upgraded Cython to 0.19.1.
Revert "Revert back due to Cython dep which is not found on Pypi."

This reverts commit 6edcbba10652a91585a5244679aed624cbb695b1.
Now able to use stable build of pymssql.

Build is now correct on 64 bits systems.
Switch to 1.2.4.