fix dupes not pasting correctly

saves are still broken though

-blue portal is bluer
-sweps can now manipulate calcview and calcviewmodelview

-Extrude code changes
-Render bounds fix
-You can now go through portals inside of objects (nocollided objects)

-in hammer editor y is now up & down and x is side to side
-tool numbers are now in hammer units
-props now go thru portals again

use base_anim not base_gmodentity

small optimizations

traceline portal edge fix

backface cull fix

hammer /2 change

Hammer support & add portals to PVS