Setup CMake package target and CI auto-deploy tags

cmake --build . --target package # or make package if make is used

can now be used to create binary packages for raylib.

AppVeyor and Travis CI are configured to push the artifacts
that result from building git tags to the related Github releases page.

appveyor.yml

@@ -10,29 +10,30 @@ init:
   - cmake -E remove c:\programdata\chocolatey\bin\cpack.exe
   - set PATH=%PATH:C:\Program Files (x86)\Git\usr\bin;=%
   - set PATH=%PATH:C:\Program Files\Git\usr\bin;=%
-  - set PATH=%prefix_dir%\bin;%PATH%
+  - if [%BITS%]==[32] set MINGW=C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32
+  - if [%BITS%]==[64] set MINGW=C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64
+  - if [%COMPILER%]==[mingw] set PATH=%MINGW%\bin;%PATH%
+  - set RAYLIB_PACKAGE_SUFFIX=-Win%BITS%-%COMPILER%
+  - set VERBOSE=1
 
 environment:
   matrix:
-    - compiler: MinGW-w64
+    - compiler: mingw
       bits: 32
-      prefix_dir: C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32
-    - compiler: MinGW-w64
+    - compiler: mingw
       bits: 64
-      prefix_dir: C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64
-    - compiler: MSVC15
+    - compiler: msvc15
       bits: 32
-    - compiler: MSVC15
+    - compiler: msvc15
       bits: 64
 
 before_build:
   - appveyor DownloadFile http://openal-soft.org/openal-binaries/openal-soft-1.17.2-bin.zip
   - 7z x openal-soft-1.17.2-bin.zip
   - move openal-soft-1.17.2-bin src\external\openal
-  - if [%COMPILER%]==[MinGW-w64] set CFLAGS=-m%BITS% & set LDFLAGS=-m%BITS% & set GENERATOR="MinGW Makefiles"
-  - if [%COMPILER%]==[MSVC15] if [%BITS%]==[32] set GENERATOR="Visual Studio 14 2015"
-  - if [%COMPILER%]==[MSVC15] if [%BITS%]==[64] set GENERATOR="Visual Studio 14 2015 Win64"
-  - set VERBOSE=1
+  - if [%compiler%]==[mingw] set CFLAGS=-m%BITS% & set LDFLAGS=-m%BITS% & set GENERATOR="MinGW Makefiles"
+  - if [%COMPILER%]==[msvc15] if [%BITS%]==[32] set GENERATOR="Visual Studio 14 2015"
+  - if [%COMPILER%]==[msvc15] if [%BITS%]==[64] set GENERATOR="Visual Studio 14 2015 Win64"
   - mkdir build
   - cd build
 
@@ -41,25 +42,26 @@ build_script:
   - cmake --build . --target install
 
 after_build:
-#  - cmake --build . --target package
+  - cmake --build . --target package
 
 before_test:
 
 test_script:
 
-#artifacts:
-#  - path: 'build\*.zip'
-#
-#deploy:
-#  description: 'Automatic build by CI'
-#  provider: GitHub
-#  auth_token:
-#    secure: XXX
-#  artifact: /.*\.zip/
-#  draft: false
-#  prerelease: false
-#  force_update: true
-#  on:
-#    branch: master
-#    appveyor_repo_tag: true        # deploy on tag push only
-#
+artifacts:
+  - path: 'build\*.zip'
+
+deploy:
+  description: 'Automatic build by CI'
+  provider: GitHub
+  auth_token:
+    secure: lqkfPGZPK828Mmopbicrng08QaaQXAshp0a9E3bMXt8+hpA8vCfDAT3jgU8kaSsW
+  artifact: /.*\.zip/
+  draft: false
+  prerelease: false
+  force_update: true
+  on:
+    branch: 
+      - master
+      - develop
+    appveyor_repo_tag: true        # deploy on tag push only