implemented controller for MVC; some errors remaining
removed some scoping problems
set params, request and response as controller instance vars
set @sinatra for controller
simplified cookie settings
changed export data to method GET
added default edge weight to layer config
better structure for layer conf
better separation of job of controller and view
Revert "added default edge weight to layer config"

This reverts commit 174ac80e2cd4d2818cd10b587d97063ea0550bd9.
English error messages in parser module
English error messages in search module
changed basic setup (still a lot of things to do)
in parser, module turned array methods into graph methods
some restructuring in order to get loading of makros on AnnoGraph creating working
fixed output of search result
fixed filtering regression
fixed regression in data export
Merge branch 'parser_conversion'
made display and layer configuration part of AnnoGraph