Constants now handled differently.  First line of groovyCode in NodeMapping, with quotes stripped, is the constant value.  Allows for lookups of them.
Mapping a constant to an element with an opt-list will now cause a choice combobox to appear.
Setting the OK value before saving.
Fixes #433: quick skipping over discarded/invalid records during link checking.
Encryption/Decryption experiment
Test encryption with fixed key
Fixes #434:  Going vertical for nice readable list entries
#434: output path also showing prefixes
#434: sorting based on main names now
#434: further sorting if the sort string values are the same
#437: Report file now accompanied by an index file containing longs which locate records in the big text file.
#437: Invalid recs file being used to create the show-only-invalid view.
#437: Sidestepped regular expressions because (.*) was failing on unicode like  "NF.1908-0211Æ1"
Merge pull request #432 from delving/fixes114

Constants now handled differently.  First line of groovyCode in NodeMapp...