Fixed issue #2. Now multiple DataJoint schemas can reside in the same MySQL database.
Implemented n-way joins
Revert "Implemented n-way joins"

This reverts commit 556bf8de51006450007c682c2b5334a25243ae37.
Changed enclosure rule to flatten n-way joins. This is equivalent to the reverted previous patch but way simpler.
Further fixes related to issue #2 (support for multiple schemas per database). Not yet fully functional.
Merge branch 'optimization' into future
Further fixes related to issue #2. Still testing.
A minor change to show Saumil how git works.
Fixed a bug in dj.Table/drop introduced since release 2.5.1. Fixed issue #5.
fixed issue #4. Deletes are now correctly restricted when cascading across non-primary dependencies.
Removed matlab-style documentation because Matlab 8 has changed how toolbox documentation is presented.
improved dj.Table/drop to enable crossing schemas, better error messages.
Fixed a bug in the SQL WHERE clause, which arose in semijoins of tables with no common attributes.
Fixed the restriction operator for cases when the restrictor has no shared attributes or is empty.
Fixed small bug introduced in last commit.
Fixed issue #7. Added the ability to append ORDER BY and LIMIT clauses. Documentation to be updated.
Fixed a bug from the last commit.
fixed bug in dj.GeneralRelvar/display caused by the previous commit.
Fixed issue #7 again
fixed small bug