Revert "Qt 5.12 and VS2017 on Windows for CI"

This reverts commit ae70c6e28e058b8c112339bca2e2fd0feea4720a.

appveyor.yml

@@ -1,4 +1,4 @@
-image: Visual Studio 2017
+image: Visual Studio 2015
 
 version: 2.3.{build}
 
@@ -7,33 +7,30 @@ branches:
         - master
 
 environment:
+    COMPILER: msvc
+    VSVER: 14
+
     matrix:
-        - QT: C:\Qt\5.12\msvc2017_64
-          GENERATOR: Visual Studio 15 2017 Win64
-          PLATFORM: x64
-        - QT: C:\Qt\5.12\msvc2017
-          GENERATOR: Visual Studio 15 2017
+        - QT: C:\Qt\5.9\msvc2015_64
+          PLATFORM: amd64
+        - QT: C:\Qt\5.9\msvc2015
           PLATFORM: x86
 
 clone_depth: 1
 
 # scripts that run after cloning repository
 install:
-    - dir C:\Qt
-    - set PATH=%QT%\bin\;C:\Qt\Tools\QtCreator\bin\;C:\Qt\QtIFW-3.0.1\bin\;%PATH%
+    - set PATH=%QT%\bin\;C:\Qt\Tools\QtCreator\bin\;C:\Qt\QtIFW2.0.1\bin\;%PATH%
     - git submodule update --init --recursive
 
 # scripts that run before build
 before_build:
-    - '%QT%\bin\qtenv2.bat'
-    - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
+    - call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" %PLATFORM%
+    # After calling vcvarsall.bat, %PLATFORM% will be X64 or x86
     - qmake --version
-    - echo %PLATFORM%
-    - cd %APPVEYOR_BUILD_FOLDER%
-    - dir
     - mkdir build
     - cd build
-    - if "%PLATFORM%" EQU "x64" (qmake -r -spec win32-msvc CONFIG+=x86_64 CONFIG-=debug CONFIG+=release ../VNote.pro)
+    - if "%PLATFORM%" EQU "X64" (qmake -r -spec win32-msvc CONFIG+=x86_64 CONFIG-=debug CONFIG+=release ../VNote.pro)
     - if "%PLATFORM%" EQU "x86" (qmake -r -spec win32-msvc CONFIG+=Win32 CONFIG-=debug CONFIG+=release ../VNote.pro)
 
 # custom build scripts
@@ -56,7 +53,7 @@ after_build:
     # Delete translations\qt_*.qm
     - del /F /Q "distrib\VNote\translations\qt_*.qm"
     # Copy OpenSSL DLLs
-    - if "%PLATFORM%" EQU "x64" (xcopy "openssl-utils.git\win64\*.dll" "distrib\VNote")
+    - if "%PLATFORM%" EQU "X64" (xcopy "openssl-utils.git\win64\*.dll" "distrib\VNote")
     - if "%PLATFORM%" EQU "x86" (xcopy "openssl-utils.git\win32\*.dll" "distrib\VNote")
     - cd distrib
     - 7z a VNote_win_%PLATFORM%_portable_%vnote_version%.zip VNote