* changed collections in config container classes to final
* collections will be instantiated while container class instatiation.
* implemented add() method in config container classes
* changed call of add() method in using classes
* modified getter methods in config container classes to return unmodifiable collections in order to prevent direct write access to them
remove @ignore anotiation from tests
made http teste working on empty redis databases

needed some additions in the @before part

this adds to #127
new class:
* QblPrimaryKeyPairTypeAdapter
new class:
* QblKeySerializationTest
-> test is not working yet as there is missing a proper equals() method for QblPrimaryKeyPair
Fixed parsing of multipart by using parseHeadless

HttpURLConnection's InputStream does not include HTTP header data.
Therefore, the mime stream parser couldn't use the content type
information transported in the content type http header field.

By using parseHeadless instead of parse, the mime parser gets the
content type info by parameter and not from the input stream itself.
fixed MultiPartCryptoTest test
Merge pull request #134 from cburkert/fix_mimestream_multipart_parsing

Fixed parsing of multipart by using parseHeadless
Merge pull request #127 from jan-schreib/unignore-tests

Un-ignore almost all tests
changed content type to application/octet-stream

closes #133
Merge pull request #136 from jan-schreib/http-content-type

changed content type to application/octet-stream
make sure that often forgotten parts are initialized
provided a new method to send a drop

doesn't need to get a full DropMessage object any more.
Merge pull request #139 from jan-schreib/easy-drop

added "comfort" interface for sending drop messages
fix NullPointerException in DropController.handleDrop() when generating ModelObjects from Modules.
Merge pull request #140 from Gottox/master

fix NullPointerException in DropController.handleDrop()
Added equals method to QblPrimaryKeyPair and its contained classes:
* QblEncKeyPair
* QblPrimaryPublicKey
* QblPublicKey
* QblSignKeyPair
Made test for QblPrimaryKeyPair serialization working