devsrc	- BB source file development directory.

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Any modifications to BB source modules should be made in this directory,
then moved into /bb/run/src directory after debugging.

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Any changes to modules should be documented in the file 'revlog' in this
directory.

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Use 'test' subdirectory to create a local version of bb for testing.
The 'makebb' macro will create a local version, after changing 'makefile'
to use the version of the source pgm in the devsrc directory.
