Changing version to 0.4-SNAPSHOT
Refactoring and multiple changes--see description.

+ Implemented a rough version of an Apache HttpClient-based client for
LAPIS.
+ Changed several field members in various classes to final, with values
injected in constructors.
+ Removed LapisPermission.java and used boolean field for read-only
functionality.
+ Replaced InputRepresentation with ByteArrayRepresentation
+ Changed current LapisTransmission to
LapisTransmissionRestletClientImpl, and created LapisTransmission
interface
Deleting JsonPropertiesParser.