Deal with parameters with renderers only

Fix #399
[README] reformat h1 to h2; highlight demo & apps
test case for plugin #399
Merge pull request #401 from owenc4a4/test

test case for plugin #399
separate platform implementations for shell_download_manager_delegate
[Mac] add implementation for shell_download_manager_delegate

Fix #373
[API] Distinguish 'js-flags' from 'chromium-args' for more natural feel. Fix #298.
Merge pull request #405 from zhchbin/master

[API] Distinguish 'js-flags' from 'chromium-args' for more natural feel
Implement HandleExternalProtocol of the ShellResourceDispatcherHostDelegate without without security check. Fix #403.
Merge pull request #406 from zhchbin/issue403

Implement HandleExternalProtocol of the ShellResourceDispatcherHostDelegate
bump version to 0.4.1
[WIN] Update status of menuitems in the menu bar. Fix #391.
[README] update for 0.4.1
bump version to v0.4.2-pre
Merge pull request #407 from zhchbin/master

[WIN] Update status of menuitems in the menu bar.
[test]add webgl test case
[test]add some website for test
[test]set timeout can not run when test passed
Merge pull request #410 from owenc4a4/test

[Test] test case for webgl, set timeout can not run when test passed
set Node frame property