add side-effect related description to README.md
remove redundant file
add online sample to README.md
fix shells(rename start jetty shell and add a fix version shell for release operation)
add maven link to quick start
copy docbkx configuration from spring, now we make the document prettier. (pdf cannot work correctly yet)
fix bugs on handling with SpecialRenderer#Clear
add more source references to sample sources
Merge branch 'master' into develop