Add the function getPlayerSummaries(options)

[susufqx]

Add the function getPlayerSummaries to get the player information by dota2 account id.
I need to use dota2-api to get the information of players and matches but the original package does not have the method to get the player's username or player's image. So I add this function.

[coveralls]

Coverage decreased (-3.5%) to 95.614% when pulling bb830ba on susufqx:master into 7be54f8 on booxood:master.

[booxood]

@susufqx Thanks for your pull request.

The code in the lib directory is generate by build. Please add source code to src directory.