extended python api
Revert "renamed the & columndefinition(..) methods to & columndefintionRef(..) to forestall problems with requesting undefined columns and expecting an undefined column instead of a exception"

This reverts commit 3f3694186ce0d1263882fa10ceb83ced8fbcb79f.
Merge branch 'master' of https://github.com/52North/IlwisConnectors
python api extended
Merge branch 'master' of https://github.com/52North/IlwisConnectors
changed casing of lookup in inifile
Merge branch 'master' of https://github.com/52North/IlwisConnectors
Merge branch 'master' of https://github.com/52North/IlwisConnectors
fixed file lookup and georef string parsing