Add API calls and their infrastructure

- Add dependencies
- Add authentification (email, password)
- Add token request
- Fetch /self
- Fetch /conversations
- Add infrastructure for above
- Add auth example

Cargo.toml

@@ -10,15 +10,18 @@ bindgen = "0.50"
 protoc-rust = "2.8.1"
 
 [lib]
-crate-type = ["dylib"]
+crate-type = ["rlib","dylib"]
 
 [dependencies]
-diesel = { version = "1.4.2", features=["sqlite"] }
 cryptobox = { git = "https://github.com/wireapp/cryptobox.git", branch = "develop" }
 proteus    = { git = "https://github.com/wireapp/proteus", branch = "develop" }
-serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
 protobuf = "2.8.1"
-chrono = { version = "0.4", features = ["serde"] }
 uuid = { version = "0.7", features = ["serde", "v4"] }
 base64 = "0.10.1"
+tungstenite = "0.9.2"
+hyper = "0.13.1"
+hyper-tls = "0.4.0"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tokio = { version = "0.2.6", features = ["full"] }
+