add missing JSON media types
virtual scrollbars for argument map view
refactoring, performance, bugs
fixed a bug in the markdown directive in order to incorporate the evaluation of state variables
Fix bug in the to-absolute-atom function

- when the atom is the symbol 'black sheep
  blacksheep:0.1/blacksheep-0.1-src.zip' the 'black sheep blacksheep'
  part was wrongly interpreted as a namespace prefix.
Merge remote-tracking branch 'refs/remotes/origin/master'
Merge branch 'master' into editors-pierre

Conflicts:
	src/CarneadesWeb/client/bower.json
add a simple edit argument page
display premises of argument
fix POST argument
fix bug in the metadata directive

- skipped was not working properly
adapt the premises to the selected scheme
improve premise editor
delete of premises
fix bug with premises in the editor

- statement are now kept properly when switching from a scheme to another
refactor
fix argument editor header
my last attempt/merge to keep track of some changes