Revert "Change IDictionary<> args to IE<KVP<>>"

This reverts commit 520bb4d4d1f54a5d823783e8bb86d6317a609c86.

Conflicts:
	CoreTweet/Rest/Users.cs
Revert "Add overloads take IDictionary or anno type as arg (undone)"

This reverts commit 235c8acbe4acd27da67622194382fb2643a578ae.
Adding IE<KVP<string, object>> and annonymous type overloads will be done later.

Conflicts:
    CoreTweet/Exceptions.cs
    CoreTweet/Objects/Tokens.cs
    CoreTweet/Rest/Account.cs
    CoreTweet/Rest/Friendships.cs
    CoreTweet/Rest/Help.cs
    CoreTweet/Rest/Search.cs
    CoreTweet/Rest/Users.cs
Bump to 0.1.7-beta