Multiple enhancements and fixes to minecarts

+ They are destroyed instantly by creative mode
* Physics is much improved
+ Basic implementation of powered rails
Fixed VS2013 compile and updated Core
Fixed settings plugin generation after IniFile
Fixed wire, rail, and pressure plate unpowering
Detaching improvements

* Players now search for an area around themselves to teleport to when
detaching from something
Final improvements to Minecarts

* Fixed curved rails being a little broken
+ Implemented detector rails
+ Implemented block collisions on rails
* Fixed snapping to rail
- Removed minecart physics conditions in Entity.cpp as minecarts use
their own simulator when on rails

Fixes #148 and #217; partially implemented #215.

This is Cave Johnson, and we're done here.
Yes newline at end of file :D
Merge pull request #538 from mc-server/minecarts

Minecarts