jSearchmonkey (JAVA) Merge Request #2: Multi-threading, Exporting, various fixes (merged)

Added

• Search is now multithreaded
  • For best performance, disable charset detection and third party content reading
• Search now streams/reads files once for both charset and content detection
• Users can export their search results as CSV or JSON
• Added support for folder/path exclusion using either Glob or Regex
• Added recursive folder search prevention

Fixed

• Display of dropdowns for Windows users
• Use of max hits so it applies to both reading and preview

Known issues

• Sorting results while a search is going on triggers caught exceptions in the Swing UI
• File timeout setting is still not used within the search algorithm
• Max recurse is still an option even when it's not used
• 3rd party searching needs to be updated to be applied to only select file extensions to improve search performance when enabled