changed output of FindFTD* routines to return the same variable containing the respective FTDI library -- makes linking to it straightforward
- link to FTDI using common variable for library reference
- added install target to lib
- default install path still source dir, but configurable using INSTALL_PREFIX variable, e.g. cmake -DINSTALL_PREFIX=/some/dir ..
- commented out python dependency (for now not needed)
- uses RPATHS now to find library; removes need to set 'LD_LIBRARY_PATH' or similar
added CMake file to build pxarGui based on ursl's code for the user interface; advances issue #4
compilation tested on OSX 10.8, CMake 2.8.12, Clang 4.2; but no detailed testing done so far, execution stops due to missing config file