Adding Travis CI and Coveralls support

pubspec.yaml

Index: pubspec.yaml
diff --git a/pubspec.yaml b/pubspec.yaml
index ee8e2eff81cddfbf14aeeed6eb1c21ea86db3999..90a7c1f880d14ddb9efbaa3ac91568fcd0dd1c85 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,14 +3,14 @@ description: Dart dev checker / compiler
 dependencies:
   analyzer:
     git:
-      url: git@github.com:dart-lang/ddc_analyzer.git
+      url: https://github.com/dart-lang/ddc_analyzer.git

[Siggi Cherem (dart-lang), 2015/03/17 15:03:50]

If this were to still require a password, another option we could do is to
automate this edit you have here, and do it in travis. For example, add a local
.gitconfig file to rewrite these or make it part of the travis script to change
it and call pub-get on it. Thoughts?

[kevmoo, 2015/03/17 15:14:38]

Now that this dependency is public, we shouldn't have a problem. This URL is
only used by pub, so the fact that it doesn't use SSH is not an issue – right?

[Siggi Cherem (dart-lang), 2015/03/17 15:18:07]

Let's try it, I think you are right. 

       ref: master
   args: ^0.12.1
   cli_util: ^0.0.1
   crypto: ^0.9.0
   dart_style:
     git:
-      url: git@github.com:dart-lang/dart_style.git
+      url: https://github.com/dart-lang/dart_style.git
       ref: master
   html5lib: ^0.12.0
   logging: ^0.9.2
@@ -26,7 +26,7 @@ dev_dependencies:
 dependency_overrides:
   analyzer:
     git:
-      url: git@github.com:dart-lang/ddc_analyzer.git
+      url: https://github.com/dart-lang/ddc_analyzer.git
       ref: master
 executables:
   # Similar to "analyzer.dart" and its command line "dartanalyzer", we use