typos
Reset regtest rt43

I am not 100% sure this will make it reproducible on different machines
(maybe we are trying to fight Lyapunov). Anyway, for sure this
test was not reset after commit 77aa3cd9058c6ffa978c360819a2c35154db0f97
and this was a mistake
ContactMap: added weights and parallelisation
rt28: reset
ContantMap changes
Merge branch 'v2.1'

Conflicts:
	regtest/analysis/rt43/analysis.0.histo.reference
	regtest/analysis/rt43/histo.reference
	regtest/analysis/rt43/output.xyz.reference
Merge branch 'v2.1'
No link cells when box is not orthorhombic
Merge branch 'master' into gradient