Use pres. compiler's charset when reading/writing files
Merge pull request #728 from edani/arrow-663

Use pres. compiler's charset when reading/writing files
Use type class (SourceSymbol) rather than scala Symbol for designations calls
Merge pull request #729 from rorygraves/rpctarget_tweaks

Use type class (SourceSymbol) rather than scala Symbol for designations ...
Random wartremover and lint cleanups
Merge pull request #735 from rorygraves/random_cleanup

Random wartremover and lint cleanups