Remove Travis and AppVeyor configuration

.travis.yml

@@ -1,13 +0,0 @@
-language: rust
-script: cargo test --all-features --all
-
-jobs:
-  include:
-  - rust: 1.36.0
-  - rust: stable
-  - rust: beta
-  - rust: nightly
-  - rust: nightly
-    env: TARGET=WASM32  # For job list UI
-    install: rustup target add wasm32-unknown-unknown
-    script: cargo build --all --target=wasm32-unknown-unknown

appveyor.yml

@@ -1,13 +0,0 @@
-install:
-  - ps: Start-FileDownload 'https://static.rust-lang.org/dist/rust-nightly-i686-pc-windows-gnu.exe'
-  - rust-nightly-i686-pc-windows-gnu.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
-  - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin
-  - rustc -V
-  - cargo -V
-  - git submodule update --init --recursive
-
-build: false
-
-test_script:
-  - cargo build
-  - cargo test --verbose