- heatmap plotting function moved to auxfunc.R

- trajectory plotting and cluster distribution plot turned into modules

- optional stats in time series plotting
- optional overlap of boxplot/violin/dotplot

- recognize "*.os.x" and "*.os.y" as valid column names with X and Y positions
- increase fixed plot with of clustered time series

- default value of number of points to skip set to 1

- detecting columns with X & Y positions and plotting them in interactive tcourse plot
- option to skip Metadata_Site for contructing unique trackID if it already exists in the dataset
- interactive box plots (works poorly)
- static time course plot (no interaction)
- skipping time points in tcourses

- box-/dot-/violin plots at discrete time points

UI overhaul: side panel added

Added:
Load button
F-n data4trajPlot that prepares data based on column selections in the UI

Error shows up in app log when plotting.

"Warning: Error in <Anonymous>: cannot open file 'Rplots.pdf'"

Fix based on: https://github.com/ropensci/plotly/issues/494

Added in plotting f-n:
if (names(dev.cur()) != "null device") dev.off()
pdf(NULL)

shinyjs library added to ui.R