Better search

[sparkica]

Finally! :) This will solve issues #256 and #274

Added:

• endless pagination on scroll (using Twitter like endless-pagination)
• ajax search on form control change - no need to press enter anymore (unless you're typing in a keyword)

Removed:

• GET parameter for past events and country as they're picked up from form data
• 3 old files that are not used (search-events.js, pjax_index.html, pjax_search_events.html)

In order for pagination to work with faceted search, I added custom endless pagination js file - I just copied original endless_pagination.js, changed all GET requests to POST requests and pass form data. IMHO this was the only sensible option in our case (my opinion based on this stackoverflow answer). @ercchy what do you think? I played around with sessions, but it was causing too many serialization issues. I don't have enough experience with overriding methods from other libraries :)

So... @ercchy can you please take a look at the changes before we deploy?

[coveralls]

Coverage increased (+0.17%) when pulling 8e3ca497c79a64aaff2f573355a5142845c88b57 on sparkica:better_search into 03198a8ef0a5beac7dfc55db715aa9926e9c91b6 on codeeu:master.

[coveralls]

Coverage increased (+0.11%) when pulling 98994d57bb535de4b5770a5aebbebf53c5c24bc6 on sparkica:better_search into 03198a8ef0a5beac7dfc55db715aa9926e9c91b6 on codeeu:master.

[ercchy]

Good work Mateja the Cat!!!