Refactored CMakeLists.txt

* new pip_module() macro
 * fixed exports
 * automatic gather all exports and pass them to Doxygen and PICodeParser

lib/main/thread/pithreadpoolexecutor.h

@@ -24,7 +24,7 @@
 #include <atomic>
 
 
-class PIThreadPoolExecutor {
+class PIP_EXPORT PIThreadPoolExecutor {
 public:
 	explicit PIThreadPoolExecutor(size_t corePoolSize = -1, PIBlockingDequeue<std::function<void()> > * taskQueue_ = 0);