Changed Application Layout to use Slim template

We used a gem called erb2slim to do the conversion.

Closes https://github.com/rapidftr/tracker/issues/130
Replaced tabs with two spaces

we used this command: sed -i "" -e "s/	/  /g"
Closes https://github.com/rapidftr/tracker/issues/120
Merge pull request #665 from ctumwebaze/master

Use human readable field names in the change log records
Merge pull request #664 from RapidRailsGirls/delete_tabs

Replaced tabs with two spaces
Further small refactorings of Child model
rapidftr/tracker#106 Log error messages when API controller catches them
Merge pull request #666 from rdsubhas/master

Log error messages when API controller catches them
Merge pull request #659 from RapidRailsGirls/erb2slim

Merged, Thanks!
Refactor and simplify Advanced Search functionality
Leftover: Date range filter in Advanced Search page
Removed custom Solr server and move to Sunspot::Solr
Added created/updated_at support, fixes all browser cukes
Updated search criteria validation, added short_id/unique_id search, all headless cukes passing
Removed unused gems and unused jasmine tests
Update cucumber rake file and remove deprecated tasks
Most RSpec tests fixed except 2 Solar tests
Enable fuzzy searching - NOTE this may break some data scenarios like Verified/Unverified
Use Sunspot API instead of custom MatchService
Use sunspot:solr rake tasks instead of custom search tasks
Merge branch 'master' of github.com:rapidftr/RapidFTR

Conflicts:
	Gemfile.lock
	app/views/layouts/application.html.erb
Merge pull request #667 from rdsubhas/master

Overhaul Search