don't hard code tag URLs
don't hard code tag URLs
fix URLs and add missing close tag
support Piwik, make Google Analytics optional
show Piwik usage
Merge pull request #2 from emning/upstream

Fix tag URLs
Merge pull request #3 from emning/analytics

Support Piwik, make Google Analytics optional
do not assume all articles are tagged
Merge pull request #4 from tshepang/patch-1

do not assume all articles are tagged
prepare to merge with fjavieralba