Refactored JPTest Qt project organization

After much trial and error, I finally got something that will work well
for a larger qt project setup. The main .pro file (and the only one you
should use to open project with Qt Creator) is
JPTestSolution/JPTestSolution.pro.

Select the default shadow build directories, and you should be able to
build successfully, since I have already set up the other (dependent)
projects to link to the JPTestLib static library.