only apply metrics-annotations to public methods

(closes #37)
refactored HttpServletResponseBufferWrapper
fixed tests
overwrite buffer related methods
Merge pull request #38 from stagemonitor/refactoring-response-wrapper

refactored HttpServletResponseBufferWrapper
fixed indentation in treetable
set request name as signature of call stack root
only expand nodes if anyChildExceedsThreshold
indenting level+1
refactored processCallTree
fix indentaion for rows with expander
worked on config tab
release  '0.7.0'.
next development version  '0.8.0-SNAPSHOT'.
Saving settings in stagemonitor widget will now show a response
Merge pull request #39 from gedankennebel/master

Saving settings in stagemonitor widget will now show a response
removed jquery dependency in injected widget
removed const for older browsers
fixed missing tooltips, changed save confirmation to use bootstrap and fixed indentation
use safe z-index for the modal dialog