SQL Lab - A multi-tab SQL editor (#514)

* Carapal react mockup

This is really just a mock up written in React to try different
components. It could become scaffolding to build a prototype, or not.

* Merging in Alanna's theme tweaks for SQL lab

* Tweak the display of the alert message in navbar

* Sketching the middleware refresh for Queries

* Adjustments

* Implement timer sync.

* CTAS

* Refactor the queries to be stored as a dict. (#994)

* Download csv endpoint. (#992)

* CSV download engdpoint.

* Use lower case booleans.

* Replcate loop with the object lookup by key.

* First changes for the sync

* Address comments

* Fix query deletions. Update only the queries from the store.

* Sync queries using tmp_id.

* simplify

* Fix the tests in the carapal. (#1023)

* Sync queries using tmp_id.

* Fix the unit tests

* Bux fixes. Pass 2.

* Tweakin' & linting

* Adding alpha label to the SQL LAb navbar entry

* Fixing the python unit tests

caravel/assets/javascripts/SqlLab/TODO.md

@@ -0,0 +1,19 @@
+
+# TODO
+* Figure out how to organize the left panel, integrate Search
+* collapse sql beyond 10 lines
+* Security per-database (dropdown)
+* Get a to work
+
+## Cosmetic
+* Result set font is too big
+* lmiit/timer/buttons wrap
+* table label is transparent
+* SqlEditor buttons
+* use react-bootstrap-prompt for query title input
+* Make tabs look great
+
+# PROJECT
+* Write Runbook
+* Confirm backups
+* merge chef branch