graph.js : remove possible file extension in sample name
dbscan.js : mute dbscan
model/scatterplot.js : improve callback/chaining ( avoid asynchronous update bug)
fuse.py : build stats about reads distribution / mute "others" artificial clones
TODO : auto-compute others clones with javascript
pdf.js: makeGraph() add title /label position
Merge branch 'master' of git+ssh://scm.gforge.inria.fr//gitroot/vidjil/vidjil
vidjil.cpp: when customizing germlines with -V or -J, set germlines to 'custom'

Additionaly, reports in .data 'germline_V' and 'germline_J'
fuse.py: --merge works again

Corrects bug introduced by 92519fc9
fuse.py: rename --merge option to --multi

--merge was confusing, this option is meant to merge several .data files with multiple germlines
(note that it works only with one sample)
model.js: nicer msg.browser_error, explaining that we are not compatible with IE 9.0

waiting for a better check in checkBrowser()
fuse.py: allow germline code with 4 letters (DHJH)