removed sign in button from sign up page

fixes #239
make panel 'stickable'
moved js into main app code
filter by question rather than requirement touch #220
extend check to see if fields have inputs filled out touch #220
build progress bars based on total achievement

the expert bar now shows how far you are towards expert, not how many
of the expert questions you have answered
moved the icons in the status panel down slightly, to align with text
preparation for internationalisation
changed description of survey, and tweaked it to display ok
Merge pull request #273 from theodi/survey-preamble-change

changed description of survey, and tweaked it to display ok
automatically updated dependencies
Merge pull request #276 from theodi/update-dependencies-2013-06-05

automatically updated dependencies
Merge pull request #257 from theodi/status-panel-fixes

Status panel fix- 220
added 'Already have account?' prompt before sign in link
Merge pull request #250 from theodi/fix-issue-239

removed sign in button from sign up page
Update en.yml

Edit text to tone down language.
display remote form ajax errors (touch #272)
Merge pull request #278 from theodi/login-issues

display remote form ajax errors (touch #272)
Issue #260 design changes to homepage

* grey text
* new logo on homepage only
* making main logo move right and down
couple of tweaks to design

aligning logo; the bars can clash with the text on the right, so can't
quite position to align with top of the text unless the background
splash is changed