Text extractor filtering fix

git-svn-id: http://svn.code.sf.net/p/clown/code/trunk@116 68affd6e-c39b-4d6d-bb22-b3492c778056
Text extractor filtering fix

git-svn-id: http://svn.code.sf.net/p/clown/code/trunk@117 68affd6e-c39b-4d6d-bb22-b3492c778056
Reference equality fixed

git-svn-id: http://svn.code.sf.net/p/clown/code/trunk@118 68affd6e-c39b-4d6d-bb22-b3492c778056
[FIX:55] Transitive condition on text position comparison fixed.

git-svn-id: http://svn.code.sf.net/p/clown/code/trunk@120 68affd6e-c39b-4d6d-bb22-b3492c778056