Merge branch 'release_v1.7'
added icons for colors lab, shapes lab, highlight words
added more icons for colors lab
Move pane setup under button click event;
Modified file attribute after copy .zip and before delete .zip;
Update version info for release 1.8.1
Merge pull request #468 from PowerPointLabs/hotfix-release-1.8

hotfix
Merge branch 'master' into release_v1.8