Some minor changes

[jneira]

• More renaming hie to hls
• Add -j argument to control the number of threads
• Show arguments and plugins when starting lsp server

[jneira]

The output is somewhat dev oriented:

Starting (haskell-language-server)LSP server...
  with arguments: Arguments {argLSP = True, argsCwd = Nothing, argFiles = [], argsVersion = False, argsShakeProfiling = Nothing, argsTesting = False, argsExamplePlugin = False, argsDebugOn = True, argsLogFile = Just "C:\\TEMP\\hls.log", argsThread = 1}
  with plugins: [PluginId "floskell",PluginId "ghcide",PluginId "ormolu",PluginId "pragmas"]

but i think we could keep it for final users, pretty printing it:

Starting (haskell-language-server)LSP server...
  with arguments: "--lsp --debug --logfile="C:\\TEMP\\hls.log --thread=1"
  with plugins: floskell, ghcide, ormolu, pragmas

[alanz]

Thanks, good to see some contributions here