Improvement: Add brackets to array param implicitly

[spuyet]

Hello,

Actually, the api joins all the arguments of an Array param but keep the key as original, see: https://github.com/arsduo/koala/blob/master/lib/koala/api.rb#L131

For example, we have to use this syntax:

api.put_connections('me', 'blocked', { 'asid[]': [ APP_SCOPED_USER_ID_1, APP_SCOPED_USER_ID_1 ] })

WDYT to remove the brackets and add them implicitly ? It looks nicer and more logical to me.

api.put_connections('me', 'blocked', { 'asid': [ APP_SCOPED_USER_ID_1, APP_SCOPED_USER_ID_1 ] })

api is a Koala::Facebook::API object.