ENH: Renamed cmStringStream to cmOStringStream and added cmIStringStream.  Removed cmInputStringStream.

Add configure option and fix potential bug in other targets. Now the run command is actually run with directory, so eventually we should be able to run this from a subdirectory

Add some minimal Dart capability to ctest. For example now you can actually use ctest to build projects, do cvs update on all platforms. This is especially cool for Visual Studio where you do not want to load the whole development environment just to build your project.

ENH: Since each test can send a lot of text to stderr/stdout, ctest now displays the list of tests that failed at the end of the process.