New attempt focused on more simplicity, more static allocation (less GC!)
and heavy-handed writes
initial work
move find/execute logic out of Database and into Query. Database will be responsible for managing the state of the database itself (indexes and values...)
Initial work on document management; documents can be added and removed. The
Document interface was added. A document must be able to fill a Meta object,
which defines the document's id as well as its indexes.

The database was made concurrent-safe.
db.NewIndex no longer exists, indexes are created implicitly as documents are added
added readme, cleaned up some of the API