test/UtilsTest: Use IAE acronym.
build: Bump & move config of m-compiler-p.
build: Bump & share config for m-pmd-p.
build: Kill DoubleCheckedLocking, removed from newest checkstyle.
build: Bump version & move config to src/conf.
build: Downgrade jsr305 to 1.3.9 & make optional again.
build: Upgrade a bunch of versions.
build: Configure pitest to 100% coverage & mutation testing.
build: Disable fork for findbugs, for speed.
build: Add library-detectors to findbugs, for guava @Beta usage.
build: Downgrade to java 6.
build: Tweak m-dependency-p exec order.
build: Move plugins to pluginManagement so exec can be re-ordered.
build: Declare remaining plugin versions.
build: Reorder plugins.

Was (alphabetic):
* checkstyle
* depedency
* enforcer
* findbugs
* pmd

Now (order of importance):
* findbugs
* pmd
* dependency
* enforcer
* checkstyle
build: Add pitest to verify phase.
build: Configure m-release-p & release profile (Sonatype).
build: Add some project config.