Cleaned up XFAIL on resources

- this failing test was confusing users
- ZMTP v3.0 now does not define resources at all
- resources, along with other unimplemented aspects moved to
  RFC 37 ZMTP v3.1
Removed duplicate zmq_z85_* methods from zmq.h

Fixes #967
Merge pull request #968 from hintjens/master

Fixed issue #967
Merge pull request #970 from mditzel/master

Fix issue #969
Fix issue #969
Fix issue #971
Merge pull request #972 from mditzel/master

Fix issue #971
Change ToolsVersion to 4.0 for VS2010
Reference default locations for libsodium for VS2010
Merge pull request #973 from HughPowell/master

Change ToolsVersion to 4.0 for VS2010
Fixed mingw poll detection
Merge pull request #974 from xantares/master

Fixed mingw poll detection
Merge branch 'zeromq/master'

Conflicts:
	builds/msvc/vs2010/inproc_lat/inproc_lat.props
	builds/msvc/vs2010/inproc_thr/inproc_thr.props
	builds/msvc/vs2010/libsodium.import.props
	builds/msvc/vs2010/libzmq.import.props
	builds/msvc/vs2010/libzmq/libzmq.props
	builds/msvc/vs2010/local_lat/local_lat.props
	builds/msvc/vs2010/local_thr/local_thr.props
	builds/msvc/vs2010/properties/Common.props
	builds/msvc/vs2010/properties/Console.props
	builds/msvc/vs2010/properties/ConsoleDebugDynamic.props
	builds/msvc/vs2010/properties/ConsoleDebugLinkTimeCodeGeneration.props
	builds/msvc/vs2010/properties/ConsoleDebugStatic.props
	builds/msvc/vs2010/properties/ConsoleReleaseDynamic.props
	builds/msvc/vs2010/properties/ConsoleReleaseLinkTimeCodeGeneration.props
	builds/msvc/vs2010/properties/ConsoleReleaseStatic.props
	builds/msvc/vs2010/properties/Debug.props
	builds/msvc/vs2010/properties/Dynamic.props
	builds/msvc/vs2010/properties/DynamicDebug.props
	builds/msvc/vs2010/properties/DynamicRelease.props
	builds/msvc/vs2010/properties/LinkTimeCodeGeneration.props
	builds/msvc/vs2010/properties/Release.props
	builds/msvc/vs2010/properties/Static.props
	builds/msvc/vs2010/properties/StaticDebug.props
	builds/msvc/vs2010/properties/StaticDebugLinkTimeCodeGeneration.props
	builds/msvc/vs2010/properties/StaticLinkTimeCodeGeneration.props
	builds/msvc/vs2010/properties/StaticRelease.props
	builds/msvc/vs2010/properties/StaticReleaseLinkTimeCodeGeneration.props
	builds/msvc/vs2010/properties/Win32.props
	builds/msvc/vs2010/properties/x64.props
	builds/msvc/vs2010/remote_lat/remote_lat.props
	builds/msvc/vs2010/remote_thr/remote_thr.props