'The version string of the last release of Flocker which can be
installed (CLI or node package). These are updated for marketing
releases, pre-releases and weekly releases but not documentation
releases.'

@property
def installable_release(self):

    if (self.weekly_release is not None):
        return ((self.release + '.dev') + self.weekly_release)
    elif (self.pre_release is not None):
        return ((self.release + 'rc') + self.pre_release)
    return self.release
