Add perturbating edges in TopoJSON test

git-svn-id: http://svn.osgeo.org/postgis/trunk@11189 b70326c6-7e19-0410-871a-916f4a2858ee
Deprecate non-CamelCase linear referencing function (#1994)

- ST_Line_Interpolate_Point renamed to ST_LineInterpolatePoint
- ST_Line_Substring renamed to ST_LineSubstring
- ST_Line_Locate_Point renamed to ST_LineLocatePoint

Tests updated to use the new signature, docs updated to show the
new signature and report deprecations

git-svn-id: http://svn.osgeo.org/postgis/trunk@11190 b70326c6-7e19-0410-871a-916f4a2858ee