Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit ce8f7b0a888dd001b7fd9e17e3bc6d2534a20abd.
Revert "[maven-release-plugin] prepare release thymeleaf-extras-tiles2-spring4-2.0.1"

This reverts commit 18d66f97f7ab21ebafe3cd12acffc765ae9a6b2b.
Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit 5fde11ffb9dfbbd278efb1c38c9ed21650f1d077.
Fixed spring4 module dependencies
Revert "Revert "[maven-release-plugin] prepare for next development iteration""

This reverts commit fab1e855cc06a416089d4edba3cbc52fb9e297db.
[maven-release-plugin] prepare release thymeleaf-extras-tiles2-spring4-2.0.1
[maven-release-plugin] prepare for next development iteration
Fixed README (required 2.0 version is now 2.0.20