udpated setup version and changelog

Author: ttinoco

CHANGELOG.md

@@ -10,6 +10,9 @@ Targets
 
 Unreleased
 ----------
+
+Version 1.2.8 (pre-release)
+---------------------------
 * Python-based parsers.
 * Info dictionary in Python wrapper that indictes availability of graphviz, python-based parser, raw parser.
 * Autotools build system (automatic detection of raw_parser, graphviz, python-based parser).

python/setup.py

@@ -19,7 +19,7 @@
 sys.argv = [sys.argv[0]] + unknown
 
 setup(name='PFNET',
-      version='1.2.7',
+      version='1.2.8',
       license='BSD 2-clause license',
       description='Power Flow Network Library',
       author='Tomas Tinoco De Rubira',