Create README.md

added some links to new README file
r
emoved
Merge branch 'IlwisCore/master'
removed
iterates over the coordinates of a geometry; it is a random access iterator
Merge branch 'IlwisCore/master'
added vertex iterator to interface for range based for loops
added vertexiterator
added namespace to parameter
locks for access functions are now better placed
some debugging changes were wrongly commited
palette based color domains have become an itemdomain (as they should have been)
interface changes; now return pointer instead of shared
new
Az
switched items around
new files added
added destructor for use inside std::unique_ptr and removed check for empty filter from isValid of CatalogView
added guard; prevent some unnecessary execution of code that will not be used anyway