version 0.6.4

version 0.6.3

Merge pull request #143 from sschuhmann/release_messages

added message for 0.6.2

Merge pull request #141 from sschuhmann/release_messages

added messages for package control

Merge pull request #138 from sschuhmann/transparent_background

Transparent background for images

Rename release file

Merge pull request #107 from pykong/fix_missalign

Fixing missalign of phantoms

Prepare release v0.5.1.

Prepare v0.5.0

Prepare v0.4.3