fix NEWS
add how to install to README
fixed Issue 9 Provide start and stop methods

add start, stop and reset methods to Profiler
update README
fixed #7 add call graph report
undo invalid replacement
change the top package to groovyx
change the version to 0.3
fix compilation error occurs when calling prettyPrint w/o argument
fix a bug that call graph uses the self time of calls as the total time
use long instead of time object for less overhead
fix bug of time percent in flat report and a demo
add prettyPrint(args) to Report
change the separator of threads in call graph report
wait until running calls in chlid threads are finishe but do not wait the child threads are dead
fix a bug there is a case that ProxyMetaClass doees not call afterInvoke

stop excluding grab from profiling
wait until running calls in chlid threads are finishe but do not wait the child threads are dead
fix npe
only prints threads have method calls
refactor