Use a symlink to the files with timestamps + length. The symlink doesn't
have timestamps so it doesn't need globbing

It used to be a debug message

The code is now very smart when loading chunks, not need to worry anymore

For some reason we lost those lines in a commit some time ago

Don't trust the chunk number written to file, but instead check each
processed chunk time range. This avoid bugs when resuming work for new
days (in a cotinuous scan that doesn't have a end date)

Previously the overlapping spanned from a chunk to the next one, but this
creates problem when adding new chunks (e.g when extending a scan to new
days)

- append chunk overlap also to last chunk
- always save chunks.dat when preparing a scan
- move logging of "New template found" from TemplateManager to TemplateMatching
  (when its indeed new)
- save more often (yes, Luca, I like to check progress more often :-)))
   (hope it's okay for you)
   ... it's not much what is saved anyway...

 - better commenting
 - better logging
 - simplifications
 - misc

+ ensure linear or log y- or x-axes still works
+ improve date tick settings

New:
 - color timeline & location plot by 4 variants:
       template number, template distance, template year, template origin time
       (information carried in template_order.dat
    +  limits can be determined automatically or set manually
    + function: TM.io.get_template_locations()
    + return locations in TM.io.readCatalogSEDDB()
 - timeline
    + theme "catalog_only"
       * can uncomment a general detection threshold indication as grey box
       * uses the original magnitude!
 - location plots:
    + legend for Basel
    + special Basel location plot for SED media communication
 - template-coloring-dependent legend style
    + choose a colorbar for 40+ templates

Improved:
 - style
    + updated colors (e.g of web theme, borehole color)
    + lighter pen/outline of detections and catalog events. Modern!
    + location plot: templates boxes --> circles. Modern!
    + Better axes limits
 - timeline:
    + larger binning in histogram (weekly) for 2+ years
    + less grid lines for 5+ years
 - fixed bash filename errors
 - renamed certain filenames
 - fixed compatibility of old location plot

With Philipp's pick guesser, the catalog times may change to a small amount when
getting the catalog at another time. (due to pick estimations)
Hence, catalog mseeds couldn't be read anymore for getting their amplitudes.
In case the change is too large (1.0s), log a Warning