Converted default theme to Bootstrap 3

Hi,

Today I redesigned the default theme of jobberBase to Bootstrap 3.

- Responsive layout
- Included most recent versions of
  - Bootstrap (3.1.1)
  - jQuery (2.1.1)
  - jQuery Validation (1.12.0)
- [Bower](http://bower.io) ready
- I used the default Bootstrap styles as much as possible. Very little custom CSS was added.
- It's easy to change to a [Bootswatch](http://bootswatch.com/) themes
- jQuery Validation messages are now localized (based on current environments locale)
- Changed directory structure, and simplified some templates

The theme is Bower ready, but I included all packages to keep installing jobberBase simple. Maybe it's a good idea to strip the included packages down to minimal size?

Before:
![snip20140610_2](https://cloud.githubusercontent.com/assets/2102973/3236100/001ef496-f0da-11e3-87bc-1bcebb4ef84f.png)

![snip20140610_5](https://cloud.githubusercontent.com/assets/2102973/3236169/d8123b1a-f0da-11e3-87ce-45177735cdbd.png)

After:
![snip20140610_3](https://cloud.githubusercontent.com/assets/2102973/3236149/94f3dfa0-f0da-11e3-8581-3f108cab4e79.png)

![snip20140610_4](https://cloud.githubusercontent.com/assets/2102973/3236172/e4169212-f0da-11e3-972a-9ca881c42c3b.png)