Simplify gitignore

Author: takluyver

.gitignore

@@ -23,12 +23,7 @@ var/
 *.egg-info/
 .installed.cfg
 *.egg
-
-# PyInstaller
-#  Usually these files are written by a python script from a template
-#  before PyInstaller builds the exe, so as to inject date/other infos into it.
-*.manifest
-*.spec
+MANIFEST
 
 # Installer logs
 pip-log.txt
@@ -49,14 +44,8 @@ coverage.xml
 *.mo
 *.pot
 
-# Django stuff:
-*.log
-
 # Sphinx documentation
 docs/_build/
 
-# PyBuilder
-target/
-
 #Ipython Notebook
 .ipynb_checkpoints