emulate PLGS' peptide cleavage; close #53
reduce number of cleavages in step 4
add PLGS argument to dbUniquePeptideSet
Merge pull request #57 from lgatto/missedCleavages

emulate PLGS' peptide cleavage; close #53
return cleavage results as vector
add createUniquePeptideDbRds (regards #55)
hide fasta digest/rds loading in dbUniquePeptideSet interface
add PLGS argument to estimateMasterFdr
throw a warning if PLGS/missedCleavage settings are differ between current and RDS
move logic of filterUnique{Ident,Quant}DbPeptides into filterUniqueDbPeptides and call dbUniquePeptideSet only once; closes #55
bump version number (the NEWS file already contains entries for 1.7.3)
add argument ILequal to dbUniquePeptideSet; closes #60
extend verbose output of dbUniquePeptideSet
rename ILequal into IisL
remove default value for IisL argument
fix missedCleavages > 1 for PLGS rule
Revert "remove default value for IisL argument"

This reverts commit 579fb7223140377ae597cd3cfde22715390b0d6f.
change IisL default to FALSE (same behaviour as synapter < 1.7.3)
add removePrecursor/tolerance argument to load{SpectrumXml,FragmentCsv}Files; closes #59
Merge branch 'removePrecursor' into IL

Conflicts:
	NEWS