added print of potential in rhs
added print of rhs and gmres result
printed cg solution in pwl
printing systemmatrix, wavelet tree and element tree before cg call
higher accuracy for print
changed precision of output
printing charge vector
printing charge to terminal
enclosed printing statements in ifdefs
Switch to try_compile for Python test
Merge branch 'master' of repo.ctcc.no:pcmsolver
Merge branch 'master' into release

Conflicts:
	src/pwl/WEMRHS_pwl.c
	src/pwl/compression_pwl.c
	src/pwl/energy_pwl.c