Add standard package paths to allow for extension mechanism
Add standard package paths to allow for extension mechanism

--HG--
branch : pm-extensions

warrenseine/premake,annulen/premake,warrenseine/premake,warrenseine/premake,Lusito/premake,annulen/premake,annulen/premake,Lusito/premake,annulen/premake,Lusito/premake,Lusito/premake