fixing the way of getting ***real*** root path (from everywhere in the code...)

Just use: conf.getRootPath()

this fix makes ALL parties happy: robotello runner; run-tests; pydev nose run inside Eclipse, whatever else:

as it was wrong relying on os.path.curdir (try it inside: lib/cli/base.py and guess what you'll get back ;))

I did with preparing this piece:
```
    def getRootPath(self):
        recentPath = os.path.curdir
        while (not os.path.isfile(recentPath + "/" + ROOT_README) and \
            recentPath != "/"):
            recentPath = os.path.abspath(recentPath + "/../")
        if recentPath == "/":
            print "Where is your %s ???" % ROOT_README
            sys.exit(-1)
        return os.path.abspath(os.path.abspath(recentPath))
```