Migrations are timestamped if so specified in .components file
Fixed test helper, replaced hardcoded value with param
add `migration_format` option to specify number or timestampe migration file format
update CHANGES
Added padrino-performance to release list
Put fix "Preserve spaces for text_area using admin/haml" on
0048cef99923c1eac6499161c0b1a01e569807de back.
Fixes #1207.
resolve merge conflict