Generated 1D testcases and added generation script.
Removed grid size 5.
test: fix warnings
common: fix support function that wraps particle positions
fix copy-paste-error in wrapping of periodic coordinates
P2NFFT: generalize test of periodic box vector lengths
P2NFFT: fix use of box offset
common: fix (again) support function that wraps particle positions
add low accuracy reference data for 1d-periodic nanowire test
Merge branch 'master' of https://github.com/scafacos/scafacos
interface: add fcs_common.* for setting up common modules
scafacos_test: allow -c parameter several times
p2nfft: disable pnfft timing output, can be re-enabled with --enable-fcs-timing=pnfft
sl_fmm: initialize global variables
pepc now uses the CPP variable
FMM now uses variable CPP
pepc: fix another usage of the CPP variable
fix last commits for using the CPP variable
scafacos_test: clean up helper scripts
scafacos_test: add option to create a Cartesian communicator