Merge pull request #34 from WeatherChannel/master

Adding support for companion ads & Support for IE8
Version 1.2.0

 - Update vast-client.js to the latest master
 - Bump version numbers to 1.2.0
Merge pull request #36 from dharFr/v1.2.0

Version 1.2.0
* add empty trackingEvents to VASTCreativeCompanion constructor
* events.EventEmitter updated to 1.0.1
Support multiple ClickTracking URLs
VASTCreativeCompanion: extend VASTCreative instead of creating trackingEvents ourself
Add contributing guidelines
Merge pull request #40 from dharFr/contributing

Add contributing guidelines
Fixed unvalid trackingEvents property for Wrapped Companions
Added some test cases for parser
Added Resume and Pause to the always sent events list
Merge pull request #44 from michaelvial/AlwaysEmitEvents

Added Resume and Pause to the have-to-sent-in-any-case events list
Bump version numbers to 1.2.1
Merge pull request #45 from michaelvial/v1.2.1

Bump version numbers to 1.2.1
Merge pull request #43 from michaelvial/WrappedCompanions

Fix #41 : Wrapped companions
Fix trackingEvents when Wrapper contains a Companion
Merge pull request #46 from dailymotion/fix-tracking-in-wrapper

Fix trackingEvents when Wrapper contains a Companion.
Version 1.2.2

 - Update vast-client.js to the latest master
 - Bump version numbers to 1.2.2
Added test cases and files for tracker
Update browserify npm module to avoid security issues