ignore .packages file

...and clean up other .gitignore entries

R=sgjesse@google.com

Review URL: https://codereview.chromium.org//1306733004 .
diff --git a/.gitignore b/.gitignore
index 89f7747..4232a2f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,4 @@
-.buildlog
-.DS_Store
-.idea
+.packages
 .pub/
-.settings/
-build/
 packages
 pubspec.lock
diff --git a/pubspec.yaml b/pubspec.yaml
index ee168a3..892fbb0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mime
-version: 0.9.3
+version: 0.9.4-dev
 author: Dart Team <misc@dartlang.org>
 description: Helper-package for working with MIME.
 homepage: https://www.github.com/dart-lang/mime