Well we have plain select without joins, which just extends keys
Added one key capability to select. Selector macro allows for more
Implemented selecting specific keys
It is now allowed to create always-true condition from nothing
select now allows filtering with 'where
Results are first filtered then reduced to requested keys
We now support numberic literals in conditions
Added a test for calculations in coditions
Removed obsolete code and comments
Renamed one test and added another stupid one
select now can incorporate one join (not tested with where)
Got rid of inner let in select macro
Added tests for keyed select with join
Added tests for select join with where