Reminders on weekends support

	- Adds a checkbox in the user settings to give the chance to receive reminders during weekends
Reminders on weekends support

	- Provides i18n support
Reminders on weekends support

	- Fixes some failing specifications, caused by the use of methods not present in the current Rspec version
Merge pull request #72 from roperzh/issue-53

Reminders on weekends support