build: Re-config m-compile-p & upgrade to Java 8.
build: Remove empty findbugs-exclude.xml.
build: Move checkstyle config to src/conf.
build: Update some project info.
build: Move empty plugin config to pluginManagement.
build: Move m-checkstyle-p config to pluginManagement.
build: Move m-dependency-p config to pluginManagement
build: Move m-enforcer-p config to pluginManagement.
build: Move findbugs-m-p config to pluginManagement.
build: Move m-jar-p config to pluginManagement.
build: Configure pitest-maven w/ thresholds.
build: Move m-pmd-p config to pluginManagement.
build: Re-order plugin executions.
build: Add pitest execution.
build: Downgrade jsr305 b/c of dep convergence.
build: Upgrade Guava to v17.0 & commons-lang3 to v3.3.2.
build: Add library-detectors FindBugs plugin for Guava.
build: Add findbugs-exclude back (derp).
build: Remove checkstyle's DoubleCheckedLocking, removed.
build: Rollback to Java 7, for FindBugs & PMD. =(