Bug 12545: Add EditorConfig.org file to the source tree

This patch adds a .editorconfig file to the source tree, that
enforces some of our coding guidelines.

Some editors try to detect the desired configurations from the currently
opened file. As we have tons of old code that doesn't follow our current
coding guidelines, this can lead to unintended QA problmes.

To test:
- Apply the patch
- Verify the .editorconfig file is in the top-level directory
- See the .editorconfig file expresses our coding guidelines

Regards
To+

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Bug 12776: Capitalization: Confirmation messages in circulation

Changes:
- Yes, renew (Y)
- Yes, check out (Y)
- No, don't check out (N)
- No, don't renew (N)

To test:
- Verify changes by reading the code
- Check out an item that requires confirmation
  Example: Patron owes fines or test with bug 12776.
- Verify confirmation messages show up correctly.
- Check item out again to trigger renewal
- Verify confirmation message shows up correctly.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Bug 12576: Make the more/fewer options and "new search" links on the advanced search page look better.

How to test:
1/ Visit /cgi-bin/koha/opac-search.pl
2/ Assert the "More/Fewer options" buttons look like bootstrap default buttons
3/ Assert the "New search" button looks like a bootstrap default button
4/ Assert the visited colour of the buttons remains #333 (light grey)
5/ Assert the buttons still function as expected

Signed-off-by: Nick Clemens <nick@quecheelibrary.org>

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Bug 12576: Update opac.css file

This file had a conflict. I prefer to put the changes in a specific
commit.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>