Bump to Version 0.4.0, Changes since  0.3.7:
* Add capability to ask for desired permissions from linked in api
* Add option to specify a proxy
* Bump hashie version
* fix the permission param passing
* fix to be able to pass the permission scope
* Manipulating comments/likes for network_updates ('shares')
* Methods to work with comments/likes for share
* Added a method to get a user's shares
* Added current user's shares as an option (client.shares)
* Readme Typos
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