Update contributing docs and add commit squash instructions
[fix bug 952686] Take down security-group page
Fix Bug 890378 - Title wrapping on CJKT Manifesto pages
Bug 892470 - Enable /new for gl
Bug 892470: enable plugincheck for km
Merge pull request #1615 from flodolo/new_gl

Bug 892470 - Enable /new for gl
Bug 925278: enable channel page for et
Merge pull request #1616 from flodolo/plugincheck_km

Bug 892470: enable plugincheck for km
Merge pull request #1617 from flodolo/channel_et

Bug 925278: enable channel page for et
Merge pull request #1607 from alexgibson/take-down-security-group

[fix bug 952686] Take down security-group page
Merge pull request #1602 from alexgibson/add-rebase-contributor-instructions

Update contributing docs and add commit squash instructions [no bug]
Make /mwc redirect temporary for Bug 963194
Merge pull request #1618 from mozilla/bug-963194-temp-mwc-redirect

Make /mwc redirect temporary for Bug 963194
Merge pull request #1613 from kyoshino/bug-890378-manifesto-wrap

Fix Bug 890378 - Title wrapping on CJKT Manifesto pages
bug 929775 -- change update redirect url
Merge pull request #1620 from chrismore/bug-929775-change-update-url

bug 929775 -- change update redirect url