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1) Add "serial" to model "problem"
2) Change the algorithm records the model "problem" in the database
3) Restyling of page "problem"
Bugfix at updating "Problem"
Add serials and sort to page 'problem'
Button "Add problem"
Fix bugs at saving problems
Administration tools
Add new fields to models
Small style refactor and create demo-base
Merge remote-tracking branch 'origin/alternative' into alternative

Conflicts:
	routes/index.js
	routes/problems.js
Administration: Users
Fix bugs  in user administration
Attempt to set date params
Fix old bugs and add new style
Add new map
fix bug at user administration
Add field visible to user
add script to create new database