JsDocstrings in spidermonkey and functions for os.readfile(), os.writefile(), os.getHostByName(), os.system(), eval()

1) I have added the documentation to the source so that it is easier to maintain and run and update the website-documentation.
2) I grouped moved the getHostByName and the readfile functions out the Ape namespace and put them into the Ape.os namespace.
3) I added a os.system, os.writefile, eval function
4) fixed some typo's, cleared some whitespace, added some todo, fixed another problem in the build.sh
5) fixed a bug with a missing fallthrough