Merge pull request #317 from melezov/master

Recompressed images.
Added categories, apps and translations
Merge branch 'master' of github.com:ElbertF/Wappalyzer
Add Silva cms app
add Silva cms app
Merge pull request #318 from wimbou/master

Added Silva CMS app
Improve PrestaShop detection

In the latest versions of PrestaShop the powered by link looks like this: <a class="_blank" href="http://www.prestashop.com" target="_blank">PrestaShop</a>, so the current RegExp fails!

This one is more generic: /Powered by <a\s+[^>]+>PrestaShop/
Merge pull request #322 from djfm/master

Improve PrestaShop detection
Added the Lift web framework and Scala which is implied by it