[zendservice] join Zend_Service, Zend\Service and zend.service

Files renamed too.
Fix a lot Zend* (components) with underscore class names to namespace
[zendservice] duplicate class name in namespace

Duplicate class name when only the namespace has 2 spaces. This fix most of the examples
Remove redundant hyperlinks

rST don't need mark a URI as a hyperlink

Regex used:
s/`([a-z]+://[\w\./_()#:-]+)`_/$1/i
s/.*_`([a-z]+://[\w\./_()#:-]+)`.*\n//i
[en] Fix  WARNING: Title underline too short.