- added NEW to Isis command enums
- remove non-modifying abstract tree functions from DwarfListener
- removed non-modifying overridden tree functions from DwarfLogger
- removed override modifier from non-modifying tree functions in DwarfServer
- removed unused 'using' statements
- removed DwarfTreeRecord struct from DwarfLogger
- added check to DwarfTree::findNode() to check if the path is null
- fixed helpstrings not being printed
- removed extraneous 'using' statements
- added some comment