several minotr mods
Merge branch 'master' of github.com:newfolder/PRT
added prtDataSetCellArray.m
Merge branch 'master' of github.com:newfolder/PRT
Bug fix in cluster plot, also fixed some tests
allow prtUtilAssignStringValuePairs.m to take structs
added a parameter in prtPreProcEnergyNormalizeRows.m to check for zero offsets
Merge branch 'master' of https://github.com/newfolder/PRT
Added the beginning of the new prtDataSetClass.plot(). Check out prtUiDataSetClassPlot() for an example
Merge branch 'master' of https://github.com/newfolder/PRT
Merge branch 'master' into issue12