* Added the template and changed corresponding documentation
Added the illustrator template and created (ILLUSTRATOR_GUIDE.md) oder changed (CONTRIBUTING.md) files.
* fixed typo
* split up template instruction docs for programs
documentation concerning the templates and instrcutions is now separated in the documentation.
* updated illustrator export documentation
updated illustrator guide with the according options for exporting SVGs
* updated image path
image path should be correct now
* matching filenames
files names illustrator guide should match file name in /images
* image in illustrator guide path correction
image should work now
* layout adjustments to illustrator guide
layout should be pretty now
* layout corrections second try
