The xtal entry now uses the serial number 'sn' and stores the entries sequentially internally.  Started adding code for sipm pages.
trying to merge
table of contents and histogrammer
added templates
Added location tag to the xtal attributes.  The xtal attributes are frozen now.
Merge branch 'mws-dev'
Fixed a bug in counting the number of entries.
Added xtal navigation buttons.
Temporary hack for xtal navigation buttons.
Bug fix for xtal entry.
Overwrite xtal doc bug fix.
started dropdown menu for histograms