Bumped API Version to 5. Changes described in the wiki page.

Added support for built-in libraries.
Added the timers library.
Added dota.remove, dota.levelUpHero, dota.levelUpAbility, dota.giveExperienceToHero, dota.removeAll and dota.clearMap.
Added a workaround that forces props that begin with m_vec to be treated as vectors.