Fix integration tests on create_test.js to use sync methods.
Create option sql-file to automatically generate sql files for up and down statements and the javascript code that load them.
Replace fsext.js with rimraf module to remove directories recursively on integration tests. (Fsext.js wasn't working with the new sqls folder inside test/migrations)
Change migration.js to allow using different templates when creating new files.
Create migration_test.js to the changes made on the constructor Migration and the new template behavior.
Add integration tests on create_test.js for the new sql-file option.
Merge branch 'sql-file-option'
Fix templates used on db-migrate.
Update documentation for the new --sql-file option
Merge remote-tracking branch 'upstream/master'

Conflicts:
	bin/db-migrate
Merge branch 'master' of github.com:agendor/node-db-migrate into agendor-master
Merge branch 'agendor-master'