added flags to disable qml plugin and test program to compile

This is usefull when there is no need to compile test program and qml plugin.

Signed-off-by: Felipe F. Tonello <ftonello@cercacor.com>
README: updated with notest and noplugin CONFIG flags

Signed-off-by: Felipe F. Tonello <ftonello@cercacor.com>
Merge pull request #13 from ftonello/pro-flags

compilation flags