Merged be.restructure, major internal reorganization.

Added a bunch of classes to make the commands, user interfaces, and
storage backends more abstract and distinct.  This should make it much
easier to extend and maintain BE.

Features:
 * Directory restructured:
   becommands/ -> libbe/commands
   submods sorted by functionality.
 * Lots of new classes:
   Option, Argument, Command
   InputOutput, StorageCallbacks, UserInterface
   Storage
 * Consolidated ID handling in libbe.util.id
 * Transitioned VCS backends for Python-based VCSs from subprocess
   calss to internal python calls.

Plus the user-visible changes:
 * New bugdir/bug/comment ID format replaces old bug:comment format.
 * Deprecated support for `be diff` on Arch and Darcs <= 2.3.1.  A new
   backend abstraction (Storage) makes the former implementation
   ungainly.
 * Improved command completion.
 * Removed commands close, open, email_bugs, 
 * Flipped some arguments
   `be assign BUG-ID [ASSIGNEE]` -> `be status ASSIGNED BUG-ID ...`
   `be severity BUG-ID SEVERITY` -> `be severity SEVERITY BUG-ID ...`
   `be status BUG-ID STATUS` -> `be status STATUS BUG-ID ...`

In the merge:
  * Added 'commit' to list of pagerless commands.
  * Updated doc/README.dev

See
#bea86499-824e-4e77-b085-2d581fa9ccab/1100c966-9671-4bc6-8b68-6d408a910da1#
for a discussion of why the changes were made and some of the
difficulties en-route.

2 files changed, 67 insertions, 0 deletions

diff --git a/.be/bea86499-824e-4e77-b085-2d581fa9ccab/bugs/22b6f620-d2f7-42a5-a02e-145733a4e366/comments/4012c6cc-1300-4f6b-af0e-9176eedf8de7/body b/.be/bea86499-824e-4e77-b085-2d581fa9ccab/bugs/22b6f620-d2f7-42a5-a02e-145733a4e366/comments/4012c6cc-1300-4f6b-af0e-9176eedf8de7/body
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--- /dev/null
+++ b/.be/bea86499-824e-4e77-b085-2d581fa9ccab/bugs/22b6f620-d2f7-42a5-a02e-145733a4e366/comments/4012c6cc-1300-4f6b-af0e-9176eedf8de7/body
@@ -0,0 +1,56 @@
+On Mon, Jul 20, 2009 at 05:03:18PM -0400, Chris Ball wrote:
+> Hi Gianluca,
+> 
+>    > In any case, having the possibility to set a due date does not
+>    > means that it is obligatory to do it and should be a good idea to
+>    > offer as many possibilities as we can to the users of BE
+> 
+> Okay, sounds reasonable.  Would you like to write a patch for
+> associating due dates and open/closed with a target?
+
+I've been mulling this over, and I think that targets are a lot like
+bugs.  Here's a list of issue/implementation pairs:
+
+  * Targeting normal bugs
+
+  With "be depend".  I think we should remove the "target" field from
+  bugs, and move target dependencies over into the "be depend"
+  framework.  Of course, we could add "blocks" (in addition to the
+  current "blocked-by") tags to make target lookup more efficient.
+
+  * "due_by"
+
+  We could add "due-by" to Bug.extra_strings as well, so that anyone
+  could set due dates for any issue they wanted.
+
+  * Bugdir-wide target
+
+  Just a pointer to the current target bug.
+
+  * Target dependency tree / time-series.
+  
+  Use BLOCKS/BLOCKED-BY tags between targets, so you'd know which ones
+  came first.
+
+  * be target list
+
+  Would become "be list --severity target".  A target "severity" would
+  keep target bugs distinct from other bug/issue types.
+
+  * Commenting on targets
+  
+  They'd be Bug()s, so commenting already build in, e.g. to add
+  release notes, layout roadmaps, etc.
+
+If you want, we could maintain the current "be target" interface,
+and just use all this stuff behind the scenes.
+
+Thoughts?
+Trevor
+
+-- 
+This email may be signed or encrypted with GPG (http://www.gnupg.org).
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+
+My public key is at http://www.physics.drexel.edu/~wking/pubkey.txt
diff --git a/.be/bea86499-824e-4e77-b085-2d581fa9ccab/bugs/22b6f620-d2f7-42a5-a02e-145733a4e366/comments/4012c6cc-1300-4f6b-af0e-9176eedf8de7/values b/.be/bea86499-824e-4e77-b085-2d581fa9ccab/bugs/22b6f620-d2f7-42a5-a02e-145733a4e366/comments/4012c6cc-1300-4f6b-af0e-9176eedf8de7/values
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@@ -0,0 +1,11 @@
+Alt-id: <20090801102742.GA29000@mjolnir.home.net>
+
+
+Author: W. Trevor King <wking@drexel.edu>
+
+
+Content-type: text/plain
+
+
+Date: Sat, 1 Aug 2009 06:27:42 -0400
+