Sling bundle projects are not properly configured if the m2e tycho configurator is not installed

Steps to reproduce

• install fresh Eclipse Kepler for EE developers
• install all features from http://people.apache.org/~rombert/sling/ide/preview/, restart
• create new sling bundle project
• there is no error marker on the project; however, it does appear when trying to import the project from outside Eclipse

There is probably a distinct Maven API to analyze projects, but the simplest way to go forward is to include/require the m2e-tycho configuration in the update site.