fix --reject-regex, add wikipedia url exclusion

fix existing --reject-regex (had one too many backslashes) and add .wikipedia.org to reject wikipedia html urls masquerading as jpg/png files (actual images are on *wikimedia.org*) 
fix the "fix" for --reject-regex

revert changes for the original regex portion, remove superfluous escaping on wikipedia portion
Escape the periods in .wikipedia.org.
Update version number.