AgentX++: Missing header from cmake install directive

In the CMakeLists.txt file, one of the main header files, agentx++.h, is missing from the list of files; specified byMY_HEADER_FILES.
That variable is used for the installdirective, so the header does not get installed.
(Resulting in failed compilation for client code.)

AgentX++: version 2.6.0

Thanks for reporting this issue. Has been fixed for 2.6.1.