Release 2.0.0a

Update version constants for 1.0.0 release

Update version constants for X1.0.0b3 release

Update version constants for X1.0.0b2 release

Update version constants for 1.0.0b1 release

Merge branch 'master' of github.com:kubernetes-incubator/client-pytho…

…n into release-1.0

Update release version to 1.0.0a4

Use setuptools normalized version 1.0.0a3

Merge pull request kubernetes-client#45 from kubernetes-incubator/o5

Update version to alpha.2 as alpha.1 is used for a failed release