fix issue of NA in 'n.spectra' when calculating summarized ratios
use column of variable width to display class labels
add attributes of quant table to summarized result table
formatting changes
improved placement of tikz peptide group pictures (but not perfect yet)

still, it is not on the same baseline as the row, but a little bit below
minor report improvements
use multiple rows for reporterMassPrecision plots when #tags>5
less space for title and removed vertical top line
uppercase section names
vertical x-axis labels in reporterIntensityPlot
fixed bug when summarizing ratios with reverse=TRUE and multiple classes
fix crash when no protein-info could be created
report improvements