rewrite searchGrid and subroutines to decrease runtime
adapt findMSeEMRTs to new findRtIndices and findMSeEMRTMatches
add NEWS entry
fix grd2 calculation
fix multiple match calculation
revert wrongly commited change
add NEWS entry
replace not by non
Merge pull request #50 from sgibb/gridSearch

Optimize gridSearch2 (and fix a bug in the calculation of non unique matches)