updated ant targets in build.xml

- properties for signing jar updated and moved to the top
- clean target added
- compile target added
- genkey target added
- signjar target updated
- runtest target added
- runconsole target added
- rungui target added
*.bat files updated

files renamed for simplicity
slash is used instead of backslash for path names inside java command
lines
minor update. typo fixed

now correct default instead of deafult
java web start jnlp file added

an option to run StgnGUI application using java web start technology
README.md updated

added more detailed project description