Add base64 encoding to message attachment example

Following the example may at times result in broken or degraded images due to sending binary data over an ascii transport mechanism. Setting the encoding to base64 fixes this, so we should include this in the example.
zend.console.getopt.fetching.rst references non-existent exception

Zend\Console\Getopt\Exception -> Zend\Console\Exception\RuntimeException
Small wrong comment fix
Update the-application.rst

fixed ActionController and RestfulController to AbstractActionController and AbstractRestfulController
Fixed code example in Authentication Validator
Update zend.authentication.intro.rst

Corrected sesssion typo
Update zend.mail.file.options.rst

Zend\Stdlib\Options should be Zend\Stdlib\AbstractOptions
Update zend.mail.file.options.rst

Zend\Stdlib\AbstractOptions does not implement ArrayAccess
Update zend.cache.storage.plugin.rst

Added missing $.
correct path
Add a comment on "invokables"

'Album\Controller\Album' => 'Album\Controller\AlbumController', is also a new line, but not mentioned in tutorial
Typing correction

Typing correction on line#11.
Merge pull request #1 from zendframework/master

pull
Added example of array based config for validators
Fixes #1328 - Obsolete module paramater in nav tut
Fixes view helper name in Sitemap docs

Removed also nested inline markup. (http://docutils.sourceforge.net/FAQ.html#is-nested-inline-markup-possible)
Added a reference to the Closure Strategy
Fixed grammatical mistake
removed unexpected **
[#1301] Added emphasize-lines directive

- to highlight the line needing bold