Require CMake 2.6.4 everywhere
Remove workarounds for CMake < 2.6.4
Do not export ACE libraries from YARP_OS
Link carriers only with the required libraries
Compile plugins as MODULE if RUNTIME is set, as STATIC if it is not
Build plugin master libraries as static and do not export their symbols
Do not link yarphear directly to yarpmod
Use LINK_PRIVATE to link exported libraries dependencies
Make wire_rep_utils a proper library, and link it only with required libs
Merge trunk up to 9573 into yarp-2.4
Export variables for available targets
Bump version to 2.3.60 and ABI version to 2
Merge trunk up to r9595

Conflicts:
	ChangeLog
	conf/template/YARPConfig.cmake.in
Remove workaround for cmake 2.6.0
Enable test only if YARP_COMPILE_TESTS is enabled
Split YarpSystemCheck and YarpAceCheck

This will allow to move find_package(ACE) in YarpFindDependencies later
Merge trunk up to r9623

Conflicts:
	src/carriers/mjpeg_carrier/CMakeLists.txt
Merge trunk up to r9634
Merge trunk up to r9641
Merge trunk up to 9676