Fix NPM Cert Change: Update Node version to 10.26 reference http://blog.npmjs.org/post/78085451721/npms-self-signed-certificate-is-no-more

Change vagrant start command from vagrant up to vagrant up --provosion, new vagrant version does not provision by default, after a halt apache wont restart automagically.
New Firefox Sync page for Bug 729329
Also add redirect from /mobile/sync/
[fix bug 988065] Update First Run tour entry point from web page to doorhanger
Use new .trailing-arrow() mixin for .more classes
Refs Bug 729329
Fix Bug 988477 - Update auto responder text for Get Involved AMO category
Merge pull request #1830 from kyoshino/bug-988477-addons-responder

Fix Bug 988477 - Update auto responder text for Get Involved AMO category
Merge pull request #1825 from sgarrity/bug-729329-new-sync

New Firefox Sync page for Bug 729329
Merge pull request #1828 from alexgibson/bug-988065-update-first-run-tour-entry-point

[fix bug 988065] Update First Run tour entry point from web page to doorhanger
Merge pull request #1743 from bensternthal/vagrant-update-node-certissue

Fix NPM Cert Change: Update Node version to 10.26