Remove debugger gem

It wouldn't install under Ruby 2.1.2, and we weren't using it anyway.
Add Rake task to load altnames.
Add altname data and include load in deploy-tasks.
Hardcode alternate-name CSV file path.
Remove superfluous* error-checks from load_altnames

* /me crosses fingers...
Fix typo in altname CSV
Make load altnames task idempotent.
Remove alternate names for crops without IDs.
Merge branch 'dev' into load_alternate_names

Conflicts:
	Gemfile.lock
	script/deploy-tasks.sh
Find crops by name when loading altnames

Crop IDs are not guaranteed to be the same on staging and production.
Merge pull request #437 from pozorvlak/load_alternate_names

Load alternate names for crops