Fixed: NA treatment. Now NA's are allowed in clustering. NA removal and interpolaton happen when the checkbox is checked in UI.

Bug fix: interpolation was expanding data to time series with freq 1; always. Now user has to provide time frequency in UI.

Rebuilt section for creating internal dt. Added ObjectNumber to labels displayd in interactive trajectory plotting.

- option to upload cell IDs for removal
- option to calculate boxplots at particular time points with respect to a preceding point

Changed:
- hierarchical clustering made into a module

- trajPlot.R; cluster colours displayed properly when manually selecting clusters to display

- colours from dendrogram cut match those in the bard plot and in trajectory plot

- 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

- 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

- modularized plot download

Added:
- download CSV with cellIDs and cluster assignment
- download CSV after cleaning

UI overhaul: side panel added