More informative build output

[dgrunwald]

SD-1822, originally created on 4/5/2011 23:21:27 by Daniel Grunwald

1. Offer more than just "Normal" and "Diagnostic" options for Build
   Verbosity.
2. Show the command-line output of any tools called by MSBuild (e.g.
   the C++ compiler).

To manage point 2), we need to handle the output of the build worker
process in SharpDevelop. For point 1), we should probably just use a
ConsoleLogger within the build worker - this way we ensure that the log
output is ordered correctly with regards to the tool output.