added plugtest tests to general jCoAP automated tests
resolved ToDos

- changed target runtime to JRE 1.7

ws4d-jcoap-plugtest
- changed target runtime to JRE 1.7
- changed dependency from jar to project
- added /.settings to .gitignore

- changed .project file
-- use JDK1.7 as Runtime Target instead of JamaicaVM
-- removed dependency to javolution

- removed javolution import
-- @ BasicCoapClientChannel.java
-- @ BasicCoapServerChannel.java
-- @ BasicCoapSocketHandler.java

- moved ws4d-jcoap/bin/.gitignore into toplevel projectfolder

- added /bin to all toplevel project .gitignore