Moved putPropDefaults() and ensurePropConsistency() to ConstantElems.java. They are autoamtically called by loadProperties() now, ensuring, undefined props are intialized with a default value, at least with an empty string.

Added folder, where code snippets can be placed for any purposes.
Merge branch 'master' of https://github.com/Isaisaisa/DB-Merlin
Merge branch 'master' of https://github.com/Isaisaisa/DB-Merlin