For the sake of readability and consistency. Moved some mapflags to their appropriate files. No functional changes.
* Added skill_duration mapflag. * This mapflag sets a skill unit time limit to n% of original duration. * Implemented mapflags for Hunter's Traps in GVG, BG, and Novice Guild maps. Signed-off-by: Cydh Ramdh <cydh@pservero.com>