Bug 976976 - Update Binary Components rationale to cover existing practice. r=emk.
Update /firefox/partners post MWC. Bug 984609.

- Retained some MWC stuff for probable re-use next year.
Up l10n cache limit to 5000 entries.
[fix bug 984499] Update Sandstone Less mixins for CSS gradients
Merge pull request #1796 from jpetto/bug-984609-post-mwc-fx-partners-updates

Update /firefox/partners post MWC. Bug 984609.
Merge pull request #1794 from gerv/master

Bug 976976 - Update Binary Components rationale to cover existing practice.
Merge pull request #1795 from alexgibson/bug-984499-update-mixins-css-gradients

[fix bug 984499] Update Sandstone Less mixins for CSS gradients
bug 978988 - Release notes templates

For Aurora, Beta, ESR, and OS (stub)