Merge pull request eth-cscs#95 from eth-cscs/release-0.6.3

Release 0.6.3

Update README.md

Correcting VERSION file

Correcting VERSION file

Update .travis.yml

Fixing Pypi deployment issues

Merge pull request eth-cscs#64 from eth-cscs/release-0.5.7

Release 0.5.7

Merge pull request eth-cscs#58 from eth-cscs/release-0.5.6

Release 0.5.6

Merge pull request eth-cscs#55 from eth-cscs/release-0.5.5

Release 0.5.5

Merge pull request eth-cscs#53 from eth-cscs/release-0.5.4

Release 0.5.4

Merge pull request eth-cscs#48 from eth-cscs/release-0.5.3

Release 0.5.3