add maintenance page
Maintenance page, spring temp

temporarily hiding the It's getting cold message
keeping the sign-up form
reverted the header too
Maintenance page updated

replacing cloudmade by stamen
added stamen.js (to be uploaded to amazon s3)
updated css to fix the 1200px div height
amazon s3 stamen.js asset

replace remote tile.stamen.js by s3 stamen.js
replace amazon s3 by local assets
remove a bunch of source files, make maintenance assets accessible
Update js assets paths
Merge branch 'master:maintenance' into gh-pages