fixed filter function. Added tests
removed unused export
added missed line between definitions of top-lvl functions
added two more lines )
fixed spaces after comas
changed tabs to spaces. Added spaces after comas in lists
Merge pull request #3 from dmirosh/fixingFilter

Fixing filter
More fold examples
Square limit by Escher
Initial version of Henderson-Escher example
Stubs for notes of lectures 5 and 6
SVG elements (line and ellipse) made polymorphic
fixed type spec for new_svg_ellipse function