Appveyor support added

appveyor.yml

@@ -0,0 +1,17 @@
+build: false
+
+environment:
+  CONAN_RUN_TESTS: 1
+  PYTHON: "C:\\Python37"
+
+  matrix:
+    - MINGW_CONFIGURATIONS: "8@x86_64@seh@posix"
+
+install:
+  - set PATH=%PATH%;%PYTHON%/Scripts/
+  - pip.exe install conan --upgrade
+  - pip.exe install conan_package_tools
+  - conan user # It creates the conan data directory
+
+test_script:
+  - python build.py