Moved more methods to 'core' as they are now more generalized.

Signed-off-by: Roland Häder <roland@mxchange.org>

diff --git a/core b/core
index 926ced328b2a6e14fa277a03bdd3a41bf202548b..b84edaf9f45857dea7078c230cea0290089c0770 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 926ced328b2a6e14fa277a03bdd3a41bf202548b
+Subproject commit b84edaf9f45857dea7078c230cea0290089c0770