Update ramclustR.R
Issue responses

add 'undefined' parameter to parameter sets, use this by default if
experimental design is set to NULL.

Reinstated use of timepos option
remove requirements to define experiment

When ExpDes=NULL and mspout=FALSE, no need to define experimental
conditions, which are used exclusively in generating output msp spectra.
Merge branch 'master' of https://github.com/cbroeckl/RAMClustR