simplified installation

No web.xml entries necessary, all filters and listeners are registered via annotations.
Migrate breaking changes:
  - Removed all stagemonitor related stuff from web.xml
  - Configure excluded paths with property key stagemonitor.web.paths.excluded
  - Change aop.xml if you have used stagemonitor-spring-mvc
    - remove SpringProfilingAspect, use ProfilingAspect instead
    - rename projectPointcut to methodsToProfile