Merge branch 'master' into core-updates

gnu: Add python2-pyicu.

* gnu/packages/python.scm (python2-pyicu): New variable.

gnu: Add python-simplejson, python2-simplejson.

* gnu/packages/python.scm (python-simplejson, python2-simplejson):
    New variables.

gnu: python2-pysqlite: Fix 'license'.

* gnu/packages/python.scm (python2-pysqlite): Refer to (@ (guix
  licenses) zlib), not to the same-named package.

Merge branch 'python'

gnu: Add python2-mechanize.

* gnu/packages/python.scm (python2-mechanize): New variable.

gnu: Add python2-sqlite.

* gnu/packages/python.scm (python2-sqlite): New variable.

gnu: Update python-babel, python2-babel to 1.3.

* gnu/packages/python.scm (python-babel, python2-babel): Update to 1.3.

gnu: Add python-dateutil, python2-dateutil.

* gnu/packages/python.scm (python-dateutil, python2-dateutil): New variables.

guix: python: Create module installation path and add it to PYTHONPATH during
  the installation phase.

* guix/build/python-build-system.scm (get-python-version): New procedure.
* guix/build/python-build-system.scm (install): Create and add path.
* gnu/packages/python.scm (python-setuptools): Drop path creation code.

gnu: Add python-setuptools, python2-setuptools.

* gnu/packages/python.scm (python-setuptools, python2-setuptools):
    New variables.

guix: python: Add package-with-python2, a procedure rewriting a package
  to compile with Python 2 instead of the default Python 3.

* guix/build-system/python.scm (default-python2, package-with-explicit-python,
    package-with-python2): New procedures.
* guix/build-system/python.scm (python2-pytz, python2-babel): Use
    package-with-python2.

Merge branch 'master' into core-updates

gnu: python: Disable tests in python2-pytz and python2-babel.

* gnu/packages/python.scm (python2-pytz, python2-babel): Disable tests.

gnu: python: Disable tests in pytz and babel.

* gnu/packages/python.scm (python-pytz, python-babel): Disable tests.

gnu: python: Implement the python naming scheme for pytz and babel.

* gnu/packages/python.scm (pytz): Rename this ...
* gnu/packages/python.scm (python-pytz): ... to this
* gnu/packages/python.scm (python2-pytz): New variable, input python-2.
* gnu/packages/python.scm (babel): Rename this ...
* gnu/packages/python.scm (python-babel): ... to this
* gnu/packages/python.scm (python2-babel): New variable, input python-2.

gnu: python: Add package python-wrapper.

* gnu/packages/python.scm (python-wrapper): New variable.

gnu: python: Revert 77c7f8f4 and make Python 3 the default.

* gnu/packages/python.scm (python-3): Rename this to...
* gnu/packages/python.scm (python): ...this, rename this to...
* gnu/packages/python.scm (python-2): ...this.

gnu: python: Temporarily make python 2 the default.

* gnu/packages/python.scm (python-2): Rename this to...
* gnu/packages/python.scm (python): ...this, rename this to...
* gnu/packages/python.scm (python-3): ...this. Reverts to version 2 as the
  default input for packages requiring Python.

gnu: python: Adapt native-search-paths for Python 3.3.

* gnu/packages/python.scm (python): Modify native-search-paths.