Fix schema migrations for tenants using sql creation

Remove hardcoded reference to 'bithub_development'
Update reloader.rb

Database was deprecated in version 0.25.0, but was still used in Apartment::Reloader and is causing many deprecation warnings in the log file.
Update migrator.rb

Database.process still called from Apartment::Migrator - should now be Tenant.process.
Merge pull request #157 from bitencode/development

Update reloader.rb - Looks like a use of Appartment::Database was missed.
Merge pull request #156 from jonsgreen/development

Fix schema migrations for tenants using sql creation
Instruction on how to config postgresql/hstore with apartment on Heroku
Merge pull request #158 from siliconstraits/heroku_postgresql_hstore

Instruction on how to config postgresql/hstore with apartment on Heroku
release v0.25.1