Added paren for select statement in set clause (Masterminds#263)

Co-authored-by: Чащин Валентин Валерьевич <[email protected]>

Add StatementBuilder.Where method

Update documentation and examples for some SelectBuilder methods and …

…Eq (Masterminds#242)

Update README.md

Merge pull request Masterminds#173 from sagikazarmark/patch-1

Fix structable link

Merge pull request Masterminds#173 from sagikazarmark/patch-1

Fix structable link

Fix NotEq{"x": []interface{}} generation

This was resolving to FALSE, but should always be TRUE.

The only portable way I found to do this was to replace the expression
with a portable TRUE (1=1). Also changed Eq{"x": []interface{}} to a
portable FALSE (1=0) for consistency to avoid nasty surprises around
returning NULL instead of a boolean.

Fixes Masterminds#99