NIFIREG-348 Update NiFi logo and ico file

Signed-off-by: Pierre Villard <pierre.villard.fr@gmail.com>

This closes #249.
diff --git a/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/bgNifiLogo.png b/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/bgNifiLogo.png
index 2558d43..1e12fee 100644
--- a/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/bgNifiLogo.png
+++ b/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/bgNifiLogo.png
Binary files differ
diff --git a/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/nifi16.ico b/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/nifi16.ico
index 2ac36701..12da810 100644
--- a/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/nifi16.ico
+++ b/nifi-registry-core/nifi-registry-web-api/src/main/resources/images/nifi16.ico
Binary files differ