Compensatory election units in DB.

Updated both DDL and input data with compensatory seat data.
ParliamentSeatsDao
Fix #20 + refactors / comments.
Capistrano: default to current branch.
prod server is not in role web.
chmod a+x build_init_script.rb.
build_init_script.rb: use base_path for ddl and etl scripts.
db:init capistrano task and deps.
deploy.rb: fix deploy:restart.