Version 2.2.4 changes.

Fixes
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  * Fixed an error where a project couldn't be exported properly if the project name contained an OS reserved character (such as /).
  * Keyboard shortcuts for bold/italic/underline now toggle on and off.
  * Adding a choice to not save changes when you exit QW with unsaved changes present.
  * Updated the encoding for a couple of files to allow for compilation on Java 1.8.  Also fixed a compile conflict with the Base64 class.
  * Fixed an issue with the export where leading unformatted text would be missing from a sentence upon export.
  * Linking of asset names in descriptions now works on the full name rather than potential partial word matches.
  * Added some prep work for changing over dictionaries to use the disk mechanism.
  * Modified the TextIterator/Sentence/Paragraph to use NavigableSet/NavigableMap to allow for easier iteration over search results.