better toString for LogicalPlan and Data
improved debug logging

RenderTree instances for WorkflowBuilder, WorkflowOp

fix grouped value node type

fix toString() for DocVar.ROOT()

clean up tree rendering for Group and Reshape

use round box glyph
rename test/data files
implement DISTINCT as query modifier and as unary operator (Fixes #211)
fix script to *actually* not kill itself
Merge pull request #300 from mossprescott/ready/startScript-hotfix

fix script to *actually* not kill itself
Enable Coveralls.

Fixes #268.
Enable parts of Wartremover.

Fixed some things it identified, and tried to turn off the minimal
number of checks and exclude the minimal number of classes. We
can slowly fix those remaining failures over time, while hopefully
avoiding adding more.

Fixes #236.
Refactoring REPL.

Mostly minor stuff, but two slightly bigger things

1. take advantage of some scalaz-stream conveniences and
2. get rid of the `throw` on exit (which was never good, but caused a
exceptional exit after upgrading to scalaz-stream 0.5).
Merge remote-tracking branch 'upstream/master' into ready/repl-refactor

Conflicts:
	src/main/scala/slamdata/engine/repl/repl.scala
Some improvements to git-workflow scripts

* `wip` calls `git fetch`, so we don’t end up branching from an out of date upstream and
* `ready` does the right thing now when re-running after a merge conflict or failed tests when there was a merge commit.
Merge pull request #304 from sellout/ready/script-updates

Some improvements to git-workflow scripts
Merge pull request #303 from sellout/ready/repl-refactor

Refactoring REPL.
Merge pull request #302 from sellout/ready/236-wartremover

Enable parts of Wartremover.
Merge pull request #301 from sellout/ready/268-code-coverage-rebase-hell

Enable Coveralls.
delete renamed files
Merge pull request #307 from mossprescott/minor

delete renamed files
delete duplicated tests (moved to exprop.scala a while back)
Merge pull request #308 from mossprescott/minor

delete duplicated tests (moved to exprop.scala a while back)
Handle many wildcard cases.

Fixes #38 and #229.

It leaves a few outstanding issues:

* results end up nested in `value` field (tracked in #287, but could be
  solved less generally than that for 1.0)
* sorts with expressions can leave extra fields in the result (tracked in #310)