Made width of inputs on sign in explicit.
Possible bugfix.
Possible bugfix on obs creation.
More warning on taxa/merge.
Bugfix with place import during search.
Bugfix: logo image in mail footer was broken.
Set default user locale on creation.
Prevent some fuzzing errors with /taxa.
Opened up /observation_fields and /observation_fields/:id
Record merging was messing up polymorphic associates.

Main symptom was subscriptions to records that don't exist. When taxa
etc were being merged, they were just updating the foreign key on
subscriptions, not the type col.