Update vagga.yaml according to the new stardards

bulk.yaml

@@ -0,0 +1,8 @@
+minimum-bulk: v0.4.5
+
+versions:
+
+- file: Cargo.toml
+  block-start: ^\[package\]
+  block-end: ^\[.*\]
+  regex: ^version\s*=\s*"(\S+)"

vagga.yaml

@@ -16,20 +16,47 @@ commands:
     environ: { RUST_BACKTRACE: 1 }
     run: [cargo, test]
 
+  bench: !Command
+    description: Run benchmarks
+    container: bench
+    environ: { RUST_BACKTRACE: 1 }
+    run: [cargo, bench]
+
+  _bulk: !Command
+    description: Run `bulk` command (for version bookkeeping)
+    container: ubuntu
+    run: [bulk]
+
 containers:
 
   ubuntu:
     setup:
-    - !Ubuntu trusty
-    - !UbuntuUniverse ~
-    - !Install [make, checkinstall, wget, ca-certificates,
-                libssl-dev, build-essential]
+    - !Ubuntu xenial
+    - !UbuntuUniverse
+    - !Install [ca-certificates, build-essential, vim]
 
     - !TarInstall
-      url: "http://static.rust-lang.org/dist/rust-1.8.0-x86_64-unknown-linux-gnu.tar.gz"
+      url: "https://static.rust-lang.org/dist/rust-1.23.0-x86_64-unknown-linux-gnu.tar.gz"
       script: "./install.sh --prefix=/usr \
                --components=rustc,rust-std-x86_64-unknown-linux-gnu,cargo"
+    - &bulk !Tar
+      url: "https://github.com/tailhook/bulk/releases/download/v0.4.10/bulk-v0.4.10.tar.gz"
+      sha256: 481513f8a0306a9857d045497fb5b50b50a51e9ff748909ecf7d2bda1de275ab
+      path: /
 
     environ:
       HOME: /work/target
       USER: pc
+
+  bench:
+    setup:
+    - !Ubuntu xenial
+    - !Install [ca-certificates, wget, build-essential]
+    - !TarInstall
+      url: https://static.rust-lang.org/dist/rust-nightly-x86_64-unknown-linux-gnu.tar.gz
+      script: |
+        ./install.sh --prefix=/usr \
+          --components=rustc,rust-std-x86_64-unknown-linux-gnu,cargo
+    environ:
+      HOME: /work/target
+      USER: pc