Update CI Config

Update Travis to the current standard.
Add AppVeyor and CircleCI configs.

.travis.yml

@@ -1,11 +1,31 @@
-language: objective-c
+language: generic
 
 sudo: false
 
 branches:
   only:
     - master
 
+git:
+  depth: 10
+
+os:
+  - linux
+  - osx
+
+env:
+  matrix:
+    - ATOM_CHANNEL=stable
+    - ATOM_CHANNEL=beta
+
+addons:
+  apt:
+    packages:
+    - build-essential
+    - git
+    - libgnome-keyring-dev
+    - fakeroot
+
 notifications:
   email:
     on_success: never

appveyor.yml

@@ -0,0 +1,21 @@
+version: "{build}"
+os: Windows Server 2012 R2
+branches:
+  only:
+    - master
+
+test: off
+deploy: off
+
+install:
+  - appveyor DownloadFile https://atom.io/download/windows -FileName AtomSetup.exe
+  - AtomSetup.exe /silent
+
+build_script:
+  - cd %APPVEYOR_BUILD_FOLDER%
+  - SET PATH=%LOCALAPPDATA%\atom\bin;%PATH%
+  - atom -v
+  - apm -v
+  - apm clean
+  - apm install
+  - apm test

circle.yml

@@ -0,0 +1,18 @@
+dependencies:
+  pre:
+    # Force updating wget due to the current containers being too out of date
+    - sudo apt-get update
+    - sudo apt-get install wget
+  override:
+    - wget -O atom-amd64.deb https://atom.io/download/deb
+    # - sudo apt-get update # Cut out until wget is fixed on the containers
+    - sudo dpkg --install atom-amd64.deb || true
+    - sudo apt-get -f install
+    - apm install
+
+test:
+  override:
+    - atom -v
+    - apm -v
+    - ./node_modules/.bin/eslint ./
+    - apm test