Use Ruby 2.1.2

Hoping this will speed up data-anonymization.
Merge pull request #247 from alphagov/feature/newer-rubbies

Use Ruby 2.1.2
Don’t install development gems in CI

debugger doesn’t work under 2.1.2 and isn’t needed.
Update whenever and chronic

http://stackoverflow.com/questions/14880347/whenever-gem-is-throwing-cant-iterate-from-time-error
Don't build on 1.9.3 in travis

We run 2.1.2 in production now.
Reduce number of workers

Want to use some of the RAM on our production environment for a RAM disk
to make il2->il0 data run faster.
Remove debugger gem.
Add a specialised lender select.

I’ve used checkboxes as it displays all of the
lenders on the screen, which should make it easier
to view and select lenders. Later on it should make
it more intuitive when we add the “All” option.
Add “All” option when selecting Lenders in LoanReport.
Add jQuery “select all” functionality for instant feedback.
Allow filtering of the loan report by phase.