cherry-picked 3f9cb70ec733db5: PmBean with enhanced read and cache behavior

Conflicts:
	pm4j-core/src/main/java/org/pm4j/core/pm/impl/PmMatcherBuilder.java
chrerry-pick 5034786c93bc49c: Enhanced PmBeanImpl(2) review changes

Conflicts:
	pm4j-core/src/main/java/org/pm4j/core/pm/impl/BroadcastPmEventProcessor.java
[maven-release-plugin] prepare release v0.8.4
[maven-release-plugin] prepare for next development iteration
Cache: fixed npe when clearing caches
[maven-release-plugin] prepare release v0.8.5
[maven-release-plugin] prepare for next development iteration
Merge branch 'v0.8': Fix for npe in clear cache config

Conflicts:
	pm4j-common/pom.xml
	pm4j-core-sample/pom.xml
	pm4j-core/pom.xml
	pm4j-core/src/main/java/org/pm4j/core/pm/impl/BroadcastPmEventProcessor.java
	pm4j-deprecated/pom.xml
	pm4j-facelets/pom.xml
	pm4j-swing/pom.xml
	pom.xml