Fixes #6137
 - Fix UserCountryMap to correctly unserialized call to  $request->process()
Merge pull request #6208 from piwik/translationupdates

[automatic translation update] Updated 510 strings in 9 languages (pl, fr, de, it, ja, nb, tr, da, el)
Add logging of SQL statements (w/ verbose level) to Db class.
Add new angularjs translation directive to aid in complex translations where HTML must be embedded in the translated string. Directive allows doing this safely and easily.
Use double colon in piwikTranslate directive so filters can be used in replacement text.
Add note about tests logs & logging level, re-organised in sections
Keep travis pages load fast: only enable logger log_level = info
keep travis fast by logging this only at debug level
fix build
Do not log bind when logging SQL statements.
added new contents plugin
New plugin on the Marketplace called InterSites provides cool new features and requires this new Piwik beta release
Replace header() with Common::sendHeader() when possible
refs #4996 some fixes, prevent JS errors on FF<9 and IE6, add random string to piwik.js to prevent caching sometimes
refs #4996 compiled piwik.js
refs #4996 we have to add build a fully qualified URL of the content piece in case we detect the URL of an image, video or audio, pdf, ... automatically. Otherwise we cannot display a preview in the UI and one would not know which URL was actually meant. Thinking about using //domain/path instead of http://domain/path as it would track different content pieces for http and https otherwise
refs #4996 on hover display an image in case it starts with https?:// and ends with jpg, gif, png or svg
refs #4996 do not animate tooltip / banner
refs #4996 in case we are in an overlay session we should not track. Check could be maybe moved to trackCallback in general?