Feature/15 Java SDK MVP Part I

See merge request !5

Feature/15 Java SDK MVP Part I: contains implementations for sending & subscribing to submissions, adds commandline client

# Conflicts:
#	README.md
#	client/src/main/java/de/fitko/fitconnect/TestRunner.java
#	client/src/main/java/de/fitko/fitconnect/client/SenderClient.java
#	client/src/main/java/de/fitko/fitconnect/client/factory/ClientFactory.java
#	dependency/src/main/java/de/fitko/fitconnect/dependency/ApplicationConfig.java
#	sdk.conf

Merge remote-tracking branch 'origin/feature/414-sdk-methoden-signaturen' into feature/414-sdk-methoden-signaturen

planning#414 Methoden Signaturen (Zwischenstand)

See merge request !1