Added DocketError type. Ten million 'if err return err' does not a happy programmer make. Time to panic, preferably at the disco.
Moved imported function out of util into helper where it belongs.
Changed most of our code to panic rather than return errors. Golang error handling is just blatantly obnoxious.
more tests of graph location creation
readme
now construct new roots of history for new image lineages.  unit tests for real operations on the storage graph.  comments for more tests intended.
Refactor toml configuration into sections. Work on #20.
Update to go 1.2, and add notes to readme about current usage.
Corrected argument handling in DocketError
Configuration loading now works with new format (save target-specific overrides). Work on #20.
Removed old file
Rename confl package to conf
move the test utility for having a temp dir for a test closure to its own file.
investigate using git with multiple/independent working trees.  works, and is easier than expected.  this will simplify code noticably and also let us do arbitrarily parallel access to the graph storage -- hooray!
work on using temporary working trees for dex operations.

implementation allows passing a function to a withTempTree() function that sets up context and automatically tears it down after.

not quite all tests are rewritten to use it yet -- we're going to make the whole idea of PreparePublish() and similar methods go away before trying to fix tests that refer to them.
moving forward on a new interface to dex.Graph that conceals the details of filesystems more thoroughly from callers.

prototype for export tentatively done, pending some minor changes in guitar; importing todo.
advance the link to guitar; remove link to dotcloud's tar fork as guitar now has.
Changed conf ConfigParser.AddConfig chainable
GraphLoadRequest, to match GraphStoreRequest.

the import for the io package has now entirely disappeared from the docket commands package, which is a portent of victory.
Now that we have a better idea of how conf works, add some initial tests.