Use Ructe (#327)

All the template are now compiled at compile-time with the `ructe` crate.

I preferred to use it instead of askama because it allows more complex Rust expressions, where askama only supports a small subset of expressions and doesn't allow them everywhere (for instance, `{{ macro!() | filter }}` would result in a parsing error).

The diff is quite huge, but there is normally no changes in functionality.

Fixes #161 and unblocks #110 and #273

plume-models/Cargo.toml

@@ -6,6 +6,7 @@ authors = ["Baptiste Gelez <baptiste@gelez.xyz>"]
 [dependencies]
 activitypub = "0.1.1"
 ammonia = "1.2.0"
+askama_escape = "0.1"
 bcrypt = "0.2"
 canapi = "0.1"
 guid-create = "0.1"
@@ -13,6 +14,7 @@ heck = "0.3.0"
 itertools = "0.7.8"
 lazy_static = "*"
 openssl = "0.10.11"
+rocket = "0.4.0-rc.1"
 reqwest = "0.9"
 serde = "1.0"
 serde_derive = "1.0"
@@ -36,10 +38,6 @@ path = "../plume-api"
 [dependencies.plume-common]
 path = "../plume-common"
 
-[dependencies.rocket]
-git = "https://github.com/SergioBenitez/Rocket"
-rev = "55459db7732b9a240826a5c120c650f87e3372ce"
-
 [dev-dependencies]
 diesel_migrations = "1.3.0"