Moves cucumber-rails to test group only
Changes Task#task_time to task_time_in_seconds
Moves conversion methods to task model
Moves database to postgres
Adds ruby version and gemset configs
Corrects :require syntax
Corrects huge typo on task_time_in_seconds column

The first migration that changes the tasks column "task_time" to
"task_time_in_seconds" accidently was spelled
"task_time_in_seconds_in_seconds". Woops! This commit fixes that.
:laughing:
Upgrades Gemfile.lock