Additional comments.
Added some content to discussion and IaaS.
Changed location of gsutil.
Added GUI in documentation and resized windows of Login and Create.
Completed GUI including pictures - excluding description.

Fixed JFileChooser exception and disfunction.
Merge remote-tracking branch 'origin/commenting_code' into Latex_documentation_holzi
finished commenting.
Merge branch 'commenting_code'
Merge branch 'Latex_documentation_holzi'