Removed rope as a dependency from elpy.rcp.

recipes/elpy.rcp:
        Removed the rope dependency from elpy. The rope dependency in
        el-get includes the full rope python library. While this is very
        convenient for installing el-get packages that require the rope
        library, it poses a major problem for Python 3 users of
        elpy. Elpy is itself fully capable of working with either python
        3 or python 2, but if it is being used with python 3 it requires
        an alternative version of rope in order to function,
        rope_py3k (https://github.com/jorgenschaefer/elpy/wiki).

        Having rope as a dependency of elpy overrides whatever version
        of rope is installed on the local machine, and prevents users of
        elpy through el-get from using elpy with Python 3 without using
        a custom recipe.

        It is better to have the users install the library themselves
        locally, rather than pulling the version 2 specific one as a
        dependency. This shouldn't be an issue as elpy users already
        have to manually install many other libraries on the system to
        support the elpy frontend (such as jedi).
Removed unneeded dependencies from elpy.rcp.

recipes/elpy.rcp:
        Removed iedit.rcp as, while useful, this package is not
        required in any way for elpy to function.

        Removed nose.rcp, as the elpy nose.rcp installs a emacs
        front-end for the nose python library. Elpy uses the nose python
        library directly so it does not require this front-end.

        Removed jedi.rcp, as the jedi front-end for emacs is not
        required for elpy. elpy uses the jedi python library directly.

        Actual dependencies for elpy can be viewed in
        https://github.com/jorgenschaefer/elpy/blob/master/elpy-pkg.el
        located in the elpy repo.
Merge pull request #1825 from isomarcte/master

Removed rope as a dependency from elpy.rcp.