Added kiss_fft as the default fft library. It is possible to use fftw with "cmake -DFFTWLIB=1"
Reorganize kiss_fft files (for license reasons)
swig wrapper for aku
removed stuff that is irrelevant for aalto from aku swig CMakelist
put back the fftw requirement so that this works with the plain aalto master
Made FFTW the default as long as it is installed
Add some documentation about kissfft
Fill in all the placeholders in the LICENSE
Add subprojects for easy building
Include cstring header for PhoneProbsToolbox (strerror)
Merge branch 'subprojects' into develop
Merge branch 'lingsoft-aku_swig_for_aalto' into develop
Merge branch 'lingsoft-kiss_fft' into develop

Conflicts:
	aku/CMakeLists.txt