ADD: Groups view. Issue #22

Show block for group.
Next: Relationship: Group <-> User/Leader. Don't display user with account, but no function in the troup!
MODIFIED: Track db migration sql files.
ADD: Groups - Model and Simple view.

You hadn't an admin interface. But the model is already coded. :)
MODIFIED: Use HTML5 Form elements.

In modern browsers HTML5 validate input before submiting. It's faster & mobile users had a better keyboard, e.g. by tipping email adress.
ADD: View leader

Shows only the leader names, without any information about the group.
Comming soon: Linked the name with contact form and shows a picture of this person.
MODIFIED: HTML5 Input time.

Use HTML5 to validate an input field.
MODIFIED: Give checkbox a value

Now it's possible. :) Important for groups (next commit).
ADD: Groups admininterface

Now you can add or edit groups
MODIFIED: Delete groups
FIXED: Relationship leader <-> group
FIXED: Right database structure
ADD: Group logo

Change the files for other logos. Selectbox gernerated by filenames.
Merge branch 'issue22' and fixed #22