SVG icons for project and layer actions

the story goes on...

Here a new set for project and layer actions icons.
![layericons](https://f.cloud.github.com/assets/127259/752994/33c8fac8-e558-11e2-958d-70968a71ed8c.png)

and for oracle:
![oracle](https://f.cloud.github.com/assets/127259/752990/1bed0174-e558-11e2-9b66-ac2c4ce838b4.png)

Last version in this pull request:
![0last2](https://f.cloud.github.com/assets/127259/766356/7c86a428-e85e-11e2-8e56-8e20a51cc0aa.png)
![zy](https://f.cloud.github.com/assets/127259/772942/f46b001a-e926-11e2-83c2-b02cb405c429.png)
![zz](https://f.cloud.github.com/assets/127259/772944/f88eebb6-e926-11e2-8d3b-ff3606e3fa3b.png)

also these icons:
Overview remove all: ![00overview-remove](https://f.cloud.github.com/assets/127259/760385/173a8178-e7ac-11e2-8f55-7d3837e33ece.png)
Overview add all: ![00overview-addall](https://f.cloud.github.com/assets/127259/760386/1753bab2-e7ac-11e2-940d-b52a795ed5d3.png)
Overview add ![00overview-add](https://f.cloud.github.com/assets/127259/760387/176e2190-e7ac-11e2-96c1-0d7ec511ca02.png)
Oracle: ![oracle](https://f.cloud.github.com/assets/127259/761829/fb0b232e-e7db-11e2-8f08-e9be3524d2b9.png)
Duplicate composer: ![00duplicate-composer](https://f.cloud.github.com/assets/127259/760390/1772ca4c-e7ac-11e2-8a50-7bb461ac48b8.png)