[Cppqed-support] cmake build system

[Raimar S. <rai...@ui...>]

Dear András,

I have pushed my first attempts with the cmake build system, and it works quite 
well (dependency checking, library detection). Could you please test the 
branch raimar/cmake?

At the top level source directory, the steps are:

mkdir build && cd build
cmake -DCMAKE_BUILD_TYPE=<type> ..

where <type> is release or debug (unfortunately this is a bit clumsy).

and then there are several options, e.g.

make -j4
make -j4 VERBOSE=1
make -j4 1particle1mode
make -j4 fewer_scripts

At the moment cmake checks for the required stuff (boost, blitz++, gsl, 
gslcblas) and fails if one of these is not found. It also checks the optional 
flens, boost-serialization and blitz++ with serialization support and enables 
the corresponding features if these are found. If not, a message is printed 
but the configuration succeeds. I would have to check if it is possible to 
override the optional features and to disable them even if they are detected 
(if this is desired?). If we are lucky this just works out of the box for 
MacOS, I will test it next week.

Best regards
Raimar