Merge branch 'release/2.0.6'

Prepping for 2.0.6 release
support nested error handler
Added one-liner rendering for full forms
CS fixes
Adding failing test demonstrating that the helper does not call 'prepare'
Fixing test introduced in @0b89787
Di fix, retriving same shared instance for different extra parameters, #3192
Code style fix, add braces to BasicClassWithParent.php
Code style fix, trailing_spaces
Update library/Zend/Mail/Transport/Sendmail.php

change key for additional_parameters argument

fix: 
sendmail error
sendmail: illegal option -- r
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
invoke fix
pass on the configured format to the DateValidator instead of hardcoding it
removed whitespaces in blank line
remove trailing spaces (again)
added newline (PSR-2)
after a discussion with Matthew, I'm removing this method alltogether because the parent already does this
Merge branch 'feature/form-view-helper' of git://github.com/Ocramius/zf2 into feature/form-view-helper
Merge branch 'feature/form-view-helper' into develop

Close #3255
Merge branch 'feature/nested-error-handler' of git://github.com/marc-mabe/zf2 into feature/log-nested-handlers
Merge branch 'feature/log-nested-handlers' into develop

Close #3257