Fix map load crashes with that one map I was sent
Adjust "Invalid value %f for -maxlightmapdim" warning
* Will now say that it is ignoring the value, and display the valid value range.
VBSP now adds extra keyvalues to worldspawn about itself
* 2 keyvalues that could be useful for debugging:
* "vbsp_version" which will contain the VBSP compile date
* "vbsp_exe" with 2 possible values "gmod" and "gmod_64". Indicates the map was compiled using GMod's VBSP
Relax IsMarkedForDeletion checks for Entity:Get functions
Fix ManipulateBone issue
Fixed a stack overflow crash with IK_ATTACHMENT