combining show/hide api key button into one button
Hide "sign in to pledge" message in /on/ when signed in
adding some placeholder text to toot box
added class to Congrats h1 to decrease font size
Merge remote-tracking branch 'origin/pr/1258'
Merge remote-tracking branch 'origin/pr/1261'
Merge remote-tracking branch 'origin/pr/1260'
Bump version to 9.4.8
Bump version to 9.4.8-dev
Merge branch 'master' into pipeline-css

Conflicts:
	www/assets/%version/gittip.css
Provide better error message when envvars missing

Fixes #1163.
Start prefixing our envvars with GITTIP_
Add a GITTIP_CACHE_STATIC configuration knob

This controls whether to set Expires for versioned resources under
/assets/.