removed unneeded functions, first step of refactor for multiple views (added a map for GraphicViews)

added refactor plan for some variables in form of comments, renamed filename in MainWindow zu m_cdi_file_name

Revert "added cdi_interface files from cdi, changed MainWindow constuctor, added new files to cde.pro"

This reverts commit 696ea74d.

This reverts commit 87390aaa.

added start range for edit lines in view, added updating of starting values for View, set decimals for lon lat to 2

first work for jumping/focusing on given lon/lat, outcommented unfinished features for first prerelease version, removed most debug code

added terrible first version of zoom on mouse position, changed id of visual grid points to lon/lat (first step of zoom to coordinate), added dummy usage window

added buttons, changed color dist function to take half of the colors for sub zero data and the other half for above zero data