Minibibs for CNC and RA

Finished the minibibs now for both RA and CNC.

- only adds minibibs for buildings that never had a bib
- appearance consistent in style to the original bibs
- nothing of the original artwork is changed, its just expands upon it
- tried do follow pizzaoverhead's advice not to change the perceived shape of the buildings and microbit's advice to remove the stones and airfield minibib
- tilesets: RA: temperat, snow, desert, interior; CNC: snow (= winter), temperat, desert
- buildings: RA: chronosphere, iron iurtain, tesla, gun turret, aa gun, sam, pillbox, flame turret, gap gen, ore Silo, service depot; CNC: tech center (MISS), hospital, ore silo, guard tower, advanced guard tower, obelisk, gun turret, service depot

If there is interest, i got a version that has minibibs for all but production buildings/ore refs for testing, too.

![radesert](https://f.cloud.github.com/assets/1968396/2457538/5c79bfec-af39-11e3-90c1-4db101572d32.PNG)
![ratemp](https://f.cloud.github.com/assets/1968396/2457540/6365e8f8-af39-11e3-9552-3f9fadcfe547.PNG)
![rasnow](https://f.cloud.github.com/assets/1968396/2457543/6e50da5c-af39-11e3-9465-52c7d67cc8ed.PNG)