Adds issue journals to development seed
Adds a board and some messages
Adds wiki and some wiki contents
Adds time entries to issues
Adds a repository and some changesets
Adds journals for planning elements
Adds news and some news journals
Improves seed creation output
Fixes problem w/ action column in change table.

It accepts only one character.
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.
Fixes changeset event author
Merge branch 'feature/journal_data_generator' of github.com:opf/openproject into feature/journal_data_generator
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
Fixes board creation.

This one would fail if description.length > 255.
Merge pull request #356 from opf/feature/journal_data_generator

[Feature] Journal Data Generator