ENH: add a new library path ordering algorithm to make sure -L paths will pick the correct libraries if possible

BUG: Using a better technique to produce the rule file name for a custom command when the output is not in the current directory or lower.

BUG: Only use the existing CMake(lang)Compiler.cmake file from the build tree if it was generated by the same version of CMake.

ENH: Added CMAKE_PROJECT_NAME variable to play the role of CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR for the top-level project name.

ENH: Added better default install location for windows builds.  The previous default /usr/local did not make much sense.  Now "%SystemDrive%/Program Files/PROJECT_NAME" is used, which is the windows equivalent to /usr/local.

ENH: LOAD_COMMAND command will now set a variable called CMAKE_LOADED_COMMAND_<COMMAND_NAME> to the full path of the loaded module if loading was successful.  Otherwise the variable is not set (will evaluate to empty string).  This is useful both in testing whether loading worked and for installing loaded command modules.

ENH: Updated implementation of custom commands.  Multiple command lines are now supported effectively allowing entire scripts to be written.  Also removed extra variable expansions and cleaned up passing of commands through to the generators.  The command and individual arguments are now kept separate all the way until the generator writes them out.  This cleans up alot of escaping issues.

ENH: Adding cmCustomCommandLine and cmCustomCommandLines subclasses of std::vector instantiations to represent multiple commands for a single custom command.  These will be used in an upcoming checkin.

COMP: Added missing forward declaration of cmMakefile.  This was only working because cmCustomCommand.h declared it.

BUG: We still want to print out the location where the object was found if it was found by the glob.