Merge pull request #936 from boegel/fix_gunzip

fix extract command for gunzip, it extracts in place
improve error message when keyring module is missing
Merge pull request #932 from boegel/agithub_py24

make sure that agithub python module can be imported without having simplejson installed
bump version to 1.13.0 and update release notes
fix remarks in v1.13.0 release notes
add missing entries in v1.13.0 release notes
Merge pull request #939 from boegel/v1.13.0

bump version to 1.13.0 and update release notes
bump version to 1.14.0dev
don't reorder $MODULEPATH entries or filter out duplicate entries, since it may cause trouble