Update files from CMake git

Since CMake 2.8.12 was released, also change directory names to
cmake-2.8.13
FindACE: Do not check ACE version if ace was not found.

Fixes: #75
[bindings] optional YARP_COMPILE_BINDINGS flag added to main build
Move check for __ACE_INLINE__ in FindACE
Replace test for ACE_INET_Addr::is_loopback with check on version
[Cleanup]
Move check for ACE_INET_Addr::is_loopback in FindACE
FindACE: Update documentation
FindACE: Do not perform tests when not found
Move check for ACE Hash_Map in FindACE
Get rid of the check for ACE_String_Base_Const::size_type

Since we dropped ACE strings, this is no longer needed.

Also drop YarpCheckTypeSize, that diverged a lot from CMake original
file, and it is no longer used.
Get rid of YarpAceCheck

Now ACE is handled almost as any other dependency
Enable testing only when required