chore(release): tag 'v2.1.0' into develop

gitflow v2.1.0

* feat: add create command to release allowing for a single step release prodution
* feat: add missing hook script filter-flow-release-finish-version
* fix: multi-line tag message when using -m
* docs: update readme with better description as to why this fork was created. Thank You [shaedrick](https://github.com/shaedrich)

git-flow-version

@@ -38,7 +38,7 @@
 #
 
 
-GITFLOW_VERSION=2.1.0-SNAPSHOT
+GITFLOW_VERSION=2.1.0
 
 initialize() {
 	# A function can not be empty. Comments count as empty.