works on class loading, errors
move sos: protocol handler to separate class loader with dbp-api in codebase
minor fixes:
replace string concatenation with SorcerEnv.websterRoot in River.groovy;
fix log in Profile;
tune log in ServiceStarter.stop(service)
temporarily disable SosUrlsTest
[pom] clean dependencies;
move Executor to sorcer-api
remove sos-platform and webster from the classpath (sos-platform is loaded by the Platform)
add exception reporting in ServiceStarter;
refactor class path checking in SorcerLauncher;
refactor environment checking in launcher.Sorcer