JSON

- Replaced old Tree-based parser with a faster, leaner parser.
  Currently lacking good error handling and a large test suite.
- Integrated new parser into Task object, for encode/decode.
- Replicated same basic unit tests.  Needs more.
- Fixed bug in handleShell that failed to call the new Context::initialize2.
- Removed debugging code from CmdInstall.
- Implemented format() that does not require width and precision args.

src/commands/CmdInstall.cpp

@@ -43,7 +43,6 @@ CmdInstall::CmdInstall ()
 ////////////////////////////////////////////////////////////////////////////////
 bool CmdInstall::implements (const std::string& command_line)
 {
-  std::cout << "# CmdInstall::implements '" << command_line << "'\n";
   return false;
 }
 
@@ -55,7 +54,6 @@ bool CmdInstall::implements (const std::string& command_line)
 //     extension.<uuid>=<JSON>
 int CmdInstall::execute (const std::string& commandLine, std::string& output)
 {
-  std::cout << "# CmdInstall::execute\n";
   return 1;
 }