Fix index name recognition

[omershelef]

When making a query, the sql parser should'nt evaluate the index name as expression, instead it should pick it up AS IS until the space. so the first word after the FROM should be recognized as index name.

The bug causing problems like described in issues #36 and #34

There is one exception, multiple indexes should be supported,
So a query like this, should work:

SELECT * FROM index1, index2, index3