Fixed RPC Call (unlock for staking only) + replaced splashscreen, icons and logos + del old posw pics (X9Developers#138)

* add docker image

* fixed entrypoint in Dockerfile, added instructions to README.md

* aligned README.md format

* changed user name and image name

* Update README.md

* Added encrypt wallet and staking only feature

* Tpos will now also be asked if staking only is enabled

* del unnecessary import in .cpp make comment doxygen conform in .h

* updated splashscreen

* added staking only from cmd and replaced olg logos and icons

* Dark Testnet Logo

Author: Simon Sorgenfrei

.gitignore

@@ -120,4 +120,5 @@ contrib/devtools/split-debug.sh
 src/core
 
 # IDE files
-.idea/
+.idea/
+nbproject