* The new scanner is currently disabled and only issues a warning
for tokens that would be lexed differently.
* Special case a few common uses of ':', to limit breakage to
a manageable level.
* Remove the horribly outdated Jambase code inherited from Perforce Jam
* Update all of Boost.Build to work in the presence of the new lexer.
Related changes:
* BoostBuild.Tester & TestCmd.TestCmd interfaces now accept external process parameters as a list of strings, thus avoiding problems with parsing arguments containing spaces.
* Avoided a potential process hang in case an external process being run prints out enough output to fill up the OS's pipe buffer (OS would pause the process until someone read the data from the pipe but the testing framework would not do this until the process in question had terminated).
[SVN r79448]
