v0.24

• added documentation in Doxygen format
• removed dependency on Boost
• renamed TimblServer namespace to TiCCServer. breaks all builds that use it!
• bumped library version to 8.0.0
• updated ClientSocket and ServerSocket classes.
• removed the Lexicon class from Treehash
• cleaned up LogStream/LogBuffer classes. removing unused stuff
• updated json to htps://github.com/nlohmann/json/releases/tag/v3.7.3
• added a tempdir() member to FileUtils
• many small code refactorings everywhere