Revert "adds pretty-data and xml2json for plugins"

This reverts commit e429f6a.

latest gcapi

Releasing version release-0.1.8

Fix commit error handling

Releasing version release-0.1.4

Releasing version release-0.1.3

connect newer gcapi / timestep submodules

Merge pull request play-co#12 from gameclosure/feature-support-links

Feature support links

reset other parts of version when incrementing version number

add a post-release script for merging release branch into develop branch