Order imports, naming fixes.
Inbound view: Remove AQ wrapper when setting default values for

newly created objects, in order to not get bogus results
(due to acquisition) when checking whether a field is
already present on the object.
Inbound view: Adapt container as the context instead

of content when looking up default value adapter (this is what the
regular add form does).
Merge pull request #21 from 4teamwork/lg-remove-aq-wrapper-when-setting-defaults

Inbound: Remove acquisition wrapper when setting defaults
SearchableTextExtender: Don't just decode the Content-Transfer-Encoding,

but also decode the actual content itself with the declared charset.

The Content-Transfer-Encoding (QP or base64) is just an encoding layer
to ensure the message contains only 7-bit characters when sending it over
SMTP. The content itself (if it contains non-ASCII characters) is still
encoded in a character set that maps unicode characters to 8-bit bytes.