Fixes #83 - Shows/hides search options

Adds conditional code for search options when a location search is done.
Fixes #84 - Removes redundant partial

Removes organizations/_search_options.html.haml
Reverts server-side conditional

Server-side check of location search will be moved to the client.
Refactors style names

Moves #search-options-screen id to actual search options area, and
renames whole search aside #search-container
Adds disable/enable feature to search radius

Search radius drop-down is enabled even when a location is not included
in the search, this update disables/enables the search radius when the
location input is enabled/disabled.
Merge pull request #85 from codeforamerica/83_hide_search_options

Fixes #83 - disables/enables search radius based on whether location search is present. Possibly a temporary fix that may be moved to the server or kept on the client if project moves to AJAX updates of content.