Administration panel redesign with Bootstrap 3

It requires a lot of work and clean up of css (or maybe moving everything to less), but it's a good start.

Before...

![zaznaczenie_015](https://f.cloud.github.com/assets/614970/1260315/043da442-2c08-11e3-9e2e-edb50a536935.jpeg)
![zaznaczenie_014](https://f.cloud.github.com/assets/614970/1260317/1191130e-2c08-11e3-8e6b-039ecd104f39.jpeg)
![zaznaczenie_013](https://f.cloud.github.com/assets/614970/1260318/11929968-2c08-11e3-94ac-017141b636bc.jpeg)

After...

![zaznaczenie_012](https://f.cloud.github.com/assets/614970/1260319/11a351ae-2c08-11e3-8b6a-27fd50ed0bb9.jpeg)
![zaznaczenie_011](https://f.cloud.github.com/assets/614970/1260320/11a875e4-2c08-11e3-8695-e576e2e2e478.jpeg)
![zaznaczenie_009](https://f.cloud.github.com/assets/614970/1260322/11b6c48c-2c08-11e3-8932-fc4f31ad95b1.jpeg)
![zaznaczenie_010](https://f.cloud.github.com/assets/614970/1260321/11b647e6-2c08-11e3-9c3d-9d87caac8623.jpeg)
![zaznaczenie_008](https://f.cloud.github.com/assets/614970/1260323/11b9455e-2c08-11e3-8aa4-d94a1f43885c.jpeg)