Do not guess variable types for sql tables by default.
type_hints is an Orange domain.
Avoid error when trying to send a selection of sql data.
Merge pull request #107 from lanzagar/master

Delete unnecessary line.
Merge pull request #106 from lanzagar/scatterplot

Avoid error when trying to send a selection of sql data.
Adapted tests for SqlTable guess_values.
Class value indexes should not be hardcoded as variables can be
recycled.
Merge pull request #108 from markotoplak/sqlopen

SqlTable: feature value guessing option, type_hints are domains.
Normalize negative indices.
Paint Data widget refactor/rewrite.

Now using pyqtgraph instead of orangeqt.
Added some docstrings.
Constant time boolean evaluation of SqlTables.
Add option in Sql Table widget to enable domain guessing.
Refactor (cached) __len__ for SqlTables.
Merge pull request #109 from ales-erjavec/paint-data

Paint data widget rewrite
Group lines in parallel coordinates.
Use logger instead of prints.
Fix display of curves in parallel coordinates plot.
Move imports to top of the file.
Merge pull request #111 from astaric/pc

Show LAC clusters in parallel coordinates