changed groupId, artifactId, symbolicName and versions of ceres modules
renamed senboxVersionRang to snapVersionRange
adapted code and tests to module renaming
updated module dependencies in beam to ceres
using new nexus server
replaced beam and ceres by snap in extensions points
switched to java8
ignoring an other test
changed names of known modules
fixed launcher tests
fixed BootstrapClasspathFactoryTest
fixed BruteForceClasspathFactoryTest
version to 0.5.0-SNAPSHOT
ceres --> snap