Exclude some development files

And emacs backups. :) Because of the way zest.releaser works, this
isn't strictly necessary, but it makes the manifest checker shut up.

MANIFEST.in

@@ -2,9 +2,10 @@ include *.rst
 include *.txt
 include *.py
 include *.ini
-include .coveragerc
-include .travis.yml
-include buildout.cfg
+exclude .coveragerc
+exclude .travis.yml
+exclude appveyor.yml
+exclude buildout.cfg
 include COPYING
 
 recursive-include doc *
@@ -14,3 +15,5 @@ global-exclude *.dll
 global-exclude *.pyc
 global-exclude *.pyo
 global-exclude *.so
+global-exclude *~
+