Fix tests
Rename to enum_ref_table so doesn't clash with enum_column3 gem
updated README
Allow initialize_attributes to take an options hash
Merge branch 'master' into rebased_with_original_fork

Conflicts:
	lib/enum_ref_table.rb
	lib/enum_ref_table/railtie.rb
	lib/enum_ref_table/record.rb
	lib/enum_ref_table/version.rb
	test/enum_ref_table/test_record.rb