Simplified gitignore (in pursuit of bug 891093)

- Added dist/ (setup.py sdist output)
- Assumed we never want to track any *.db files

Change-Id: I5b59e55064ad2abc315790512c2b87c8cc4704c9

.gitignore

@@ -1,23 +1,20 @@
 *.pyc
+.cache/
 .project
 .project/
-.cache/
 .pydevproject
 .pydevproject/
 .settings/
-keystone.db
-ldap.db
-keystone.token.db
+.keystone-venv/
+build/
+dist/
+doc/source/sourcecode
+keystone.egg-info/
+*.db
 .*.swp
 *.log
 *.pid
 pidfile
 *.komodoproject
-build/
-doc/source/sourcecode
-.keystone-venv/
-keystone.egg-info/
-run_tests.err.log
 .coverage
 .DS_Store
-test_migrations.db