Update to 0.8.3 using BNG 2.9.1

Author: jrfaeder

bionetgen/assets/BNGVERSION

@@ -1 +1 @@
-BioNetGen-2.9.0
+BioNetGen-2.9.1

bionetgen/assets/VERSION

@@ -1 +1 @@
-0 8 2 alpha 0
+0 8 3 alpha 0

setup.py

@@ -156,13 +156,13 @@
 setup(
     name="bionetgen",
     version=VERSION,
-    description="A simple CLI and library for BioNetGen modelling language",
+    description="A simple CLI and library for the BioNetGen modeling language",
     long_description=LONG_DESCRIPTION,
     long_description_content_type="text/markdown",
-    author="Ali Sinan Saglam",
-    author_email="als251@pitt.edu",
+    author="Ali Sinan Saglam, Alex DiBiasi, and James R. Faeder",
+    author_email="bionetgen.main@gmail.com",
     url="https://github.com/RuleWorld/PyBioNetGen",
-    license="unlicensed",
+    license="MIT",
     packages=find_packages(exclude=["ez_setup", "tests*"]),
     package_data={"bionetgen": ["bng*/*", "assets/*"]},
     zip_safe=False,