The Travis post build is only for the main repo

Skip it if it's PR testing or not the main repo
Merge pull request #1023 from nschonni/remove-zero-units

No units for zero values
Correct PR testing env variable

Missed that it's not true if it's a PR from the docs
'TRAVIS_PULL_REQUEST: The pull request number if the current job is a
pull request, "false" if it's not a pull request.'
Removed text shadows from fullhd and fullft.
Removed text shadows from Base/WET theme headers and footers.
Fixed display of the filler content in desktop view.
Merge pull request #1020 from nschonni/merge-ie-scss

Merge IE7 and IE8 SCSS
Resolved merge conflicts. Extended IE7/IE8 SCSS consolidation to other themes.
Merge branch 'master' into experimental
Remove base-default-screen-foot-border extension.
Corrected IE7/IE8 links in GCWU splash and server message pages.
Cleaned up minor padding issues in the GCWU splash pages in IE7.
Merge branch 'v3.0'
Merge branch 'master' into experimental
Fixed Base and WET theme sub-site name display in IE7.
Fixed GCWU intranet theme sub-site name display in IE7.
Merge branch 'v3.0'
Optimized sub-site name display in GCWU theme in IE7.
Merge branch 'master' into experimental
Fixed no-JS support on details/summary polyfill example.