Avoid repetition of the version number.

The old setup.py resulted in a version number that looked like e.g. 5.7.15.7.1
when running setup.py.  With this change, we get a correct version number; e.g.
5.7.1.

Author: ketch

setup.py

@@ -104,16 +104,13 @@ def write_version_py(filename=version_file_path):
 
     cnt = """
 # This file is generated by clawpack/setup.py.
-short_version = '%(version)s'
 version = '%(version)s'
-full_version = '%(full_version)s'
 git_revision = '%(git_revision)s'
 """
     # Adding the git rev number needs to be done inside
     # write_version_py(), otherwise the import of clawpack.version messes
     # up the build under Python 3.
 
-    FULLVERSION = VERSION
     if os.path.exists('.git'):
         GIT_REVISION = git_version()
     elif os.path.exists(version_file_path):
@@ -124,7 +121,6 @@ def write_version_py(filename=version_file_path):
 
     with open(filename, 'w') as a:
         a.write(cnt % {'version': VERSION,
-                       'full_version' : FULLVERSION,
                        'git_revision' : GIT_REVISION})
 
     del sys.path[0]
@@ -230,7 +226,6 @@ def setup_package(setup_dict, subpackages):
         license = 'BSD',
         classifiers=[_f for _f in CLASSIFIERS.split('\n') if _f],
         platforms = ["Linux", "Solaris", "Mac OS-X", "Unix"],
-        version = VERSION,
         )
 
     # python setup.py git-dev sets up subpackages