main: Allow for a non-integer time step in filenames
correlation: More distinguishable colors in plots
histogram: More distinguishable colors in plots
main: Generalize suffix definition for projected data

The file suffix for projected data is defined only in
one makefile that defines the projection procedure.
cossin: Basic structure
cossin: Generate cos-/sin-transformed data
cossin: Command to append follower column to data

A common command is defined to append the last column of source data to
projected data. It is only used in other makefiles that include cossin.
dpca: Use cossin to get cos-/sin-transformed data
tica: Basic structure
tica: Generate cos-/sin-transformed data
tica: Time lagged independent component analysis
tica: Minima and maxima to set binning ranges
main: By default apply PCA and not TICA

Both transformations are currently applied
to cos-/sin-transformed data.