fix #27 Removing useless asynchronism in packaged mode.

When loading a packaged module with a synchronous request, the loaded
module was not synchronously available because some asynchronism was
added in the promises chain. This commit fixes this issue.
Updating karma version.
Updating browsers to be tested.
Switching to the native sauce-connect application.
Increasing timeouts in tests.
Removing SL_iOS_6 from the list of browsers because it is misbehaving.

Mobile Safari 6.0.0 (iOS 6.0) executes tests in loop, without stopping,
as shown on the following build log:
https://travis-ci.org/ariatemplates/noder-js/builds/40178104