Fixed interface in dossiers ConstrainTypeDecider.

The default adapter should use `Interface` as adapting interface
for the request. Otherwise overriding the ConstrainTypeDecider
in a customer package, is not possible without inheriting from
`Products.CMFDefault.interfaces.ICMFDefaultSkin` in the customers browserlayer.
Merge pull request #259 from 4teamwork/pg_fix_constrainttype_decider

Fixed interface in dossiers ConstrainTypeDecider.
Byline: Removed icon from byline.
Merge pull request #262 from 4teamwork/jin-byline

Byline: Removed icon from byline.
Changed source for repository import: from csv to xls.
Moved examplecontent from csv to xls.
Added xls import tests.
Added force-text macro in text form.
Merge pull request #254 from 4teamwork/lk_xlsx_source

Import directly from Excel-File
Treeportlet: Enable scrolling in the portlet and scroll down to selected item.
Merge pull request #261 from 4teamwork/jin-scrolling-treeportlet

Treeportlet: Enable scrolling in the portlet
Added responsible org field on repositoryfolder.
Merge pull request #260 from 4teamwork/lk_responsible_org

Ordnungsposition erweitern um "Federführung Amt"
Proof-of-concept implementation for setting docProperties in templates.
Create helper class to create documents from templates.
Add tests for doc property adapters.
Add tests for creating templates from word-files.
Add a registry setting to disbale/enable doc-properties from templates.