Build

- Use absolute file paths by using $$PWD variable.
- Adds unit testing project + unit-test for serialization.
- Adds ADS_IMPORT define possibility for static code include.

Core
- Fixes usage of QBuffer.. missed the QBuffer::open() call..

AdvancedDockingSystemUnitTests/AdvancedDockingSystemUnitTests.pri

@@ -0,0 +1,7 @@
+
+HEADERS += \
+	$$PWD/src/TestCore.h
+
+SOURCES += \
+	$$PWD/src/main.cpp \
+	$$PWD/src/TestCore.cpp