Add AppVeyor (Windows) build status badge

Also clear cache on_success rather than on_finish

Author: DenWav

appveyor.yml

@@ -8,7 +8,7 @@ build_script:
 test_script:
   - gradlew.bat check --no-daemon
 
-on_finish:
+on_success:
   - ps: rm C:\Users\appveyor\.gradle\caches\modules-2\*.lock -force
   - ps: rm C:\Users\appveyor\.gradle\caches\transforms-1\*.lock -force
   - ps: rm C:\Users\appveyor\.gradle\caches\*\file-changes\ -recurse -force

readme.md

@@ -3,12 +3,13 @@
 Minecraft Development for IntelliJ
 ==================================
 
-|  Service           |Status|
-|--------------------|------|
-|    **TeamCity**    |[![TeamCity Build Status](https://tc.demonwav.com/app/rest/builds/buildType:(id:MinecraftDev_Build)/statusIcon)](https://ci.demonwav.com/viewType.html?buildTypeId=MinecraftDev_Build)|
-|    **Nightly**     |[![TeamCity Nightly Status](https://tc.demonwav.com/app/rest/builds/buildType:(id:MinecraftDev_Nightly)/statusIcon)](https://ci.demonwav.com/viewType.html?buildTypeId=MinecraftDev_Nightly)|
-| **Travis (Linux)** |[![Travis Linux Build Status](https://travis-matrix-badges.herokuapp.com/repos/minecraft-dev/MinecraftDev/branches/dev/1)](https://travis-ci.org/minecraft-dev/MinecraftDev/)|
-| **Travis (macOS)** |[![Travis macOS Build Status](https://travis-matrix-badges.herokuapp.com/repos/minecraft-dev/MinecraftDev/branches/dev/2)](https://travis-ci.org/minecraft-dev/MinecraftDev/)|
+|        Service         |Status|
+|------------------------|------|
+|      **TeamCity**      |[![TeamCity Build Status](https://tc.demonwav.com/app/rest/builds/buildType:(id:MinecraftDev_Build)/statusIcon)](https://ci.demonwav.com/viewType.html?buildTypeId=MinecraftDev_Build)|
+|      **Nightly**       |[![TeamCity Nightly Status](https://tc.demonwav.com/app/rest/builds/buildType:(id:MinecraftDev_Nightly)/statusIcon)](https://ci.demonwav.com/viewType.html?buildTypeId=MinecraftDev_Nightly)|
+|   **Travis (Linux)**   |[![Travis Linux Build Status](https://travis-matrix-badges.herokuapp.com/repos/minecraft-dev/MinecraftDev/branches/dev/1)](https://travis-ci.org/minecraft-dev/MinecraftDev/)|
+|   **Travis (macOS)**   |[![Travis macOS Build Status](https://travis-matrix-badges.herokuapp.com/repos/minecraft-dev/MinecraftDev/branches/dev/2)](https://travis-ci.org/minecraft-dev/MinecraftDev/)|
+| **AppVeyor (Windows)** |[![AppVeyor Windows Build Status](https://ci.appveyor.com/api/projects/status/p2qp6iinqvf4im64/branch/dev?svg=true)](https://ci.appveyor.com/project/DemonWav/minecraftdev/branch/dev)|
 
 Info and Documentation [![Current Release](https://img.shields.io/badge/release-2017.3--1.2.0-orange.svg?style=flat-square)](https://plugins.jetbrains.com/plugin/8327)
 ----------------------