Removes unused variables.
Resolves hidden variables.
Enable development seeding right after migrations.

This adds CustomValue to the classes that need ot have their schema
cache cleared and column information reset in development.
Fixes time log entry generation.

Previously, it was possible to have no activities, [].sample would be
nil. This is now fixed by always having five activities.
Moves active record fixes out into seeds.rb

The seeds/*.rb files previously cleared only the models that they were
using. The seeds.rb now clears all models prior to executing any seed
files. This finally enables

    rake db:migrate db:seed

for all environments and models.
Merge remote-tracking branch 'opf/feature/journal_data_generator' into feature/journal_data_generator