Fix Windows' CI script sourcing Dependencies from old Mercurial repo

It should source it from github instead
Update to Visual Studio 2019

Scripts/BuildScripts/build_ci_windows.bat

@@ -2,8 +2,7 @@
 @echo off
 SETLOCAL
 
-set OGRE_BRANCH_NAME=master
-set GENERATOR="Visual Studio 14 2015"
+set GENERATOR="Visual Studio 16 2019"
 set PLATFORM=x64
 set CONFIGURATION=Debug
 set BUILD_FOLDER=%APPVEYOR_BUILD_FOLDER%
@@ -25,10 +24,16 @@ IF EXIST %CMAKE_BIN_x64% (
 )
 echo Using CMake at %CMAKE_BIN%
 
+%CMAKE_BIN% --version
+echo -- PATH --
+echo %PATH%
+echo -- PYTHONPATH --
+echo %PYTHONPATH%
+
 IF NOT EXIST %BUILD_FOLDER%\..\ogredeps (
 	mkdir %BUILD_FOLDER%\..\ogredeps
 	echo --- Cloning Ogredeps ---
-	hg clone https://bitbucket.org/cabalistic/ogredeps %BUILD_FOLDER%\..\ogredeps
+	git clone --recurse-submodules --shallow-submodules https://github.com/OGRECave/ogre-next-deps %BUILD_FOLDER%\..\ogredeps
 ) ELSE (
 	echo --- Ogredeps repo detected. Cloning skipped ---
 )

appveyor.yml

@@ -1,9 +1,4 @@
-version: 2.2.{build}
-
-branches:
-   only:
-     - master
-     - v2-1
+version: 2.1.{build}
 
 environment:
   matrix:
@@ -23,7 +18,11 @@ environment:
 #      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
 #      BUILD_SCRIPT: build_ogre_Visual_Studio_14_2015_x64.bat
     - PLATFORM: x64
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      PYTHON: "C:\\Python36-x64"
+      PYTHONHOME: "C:\\Python36-x64"
+      PYTHONPATH: "C:\\Python36-x64\\lib\\site-packages"
+      PATH: "C:\\Python36-x64;C:\\Python36\\Scripts;%PATH%"
       BUILD_SCRIPT: build_ci_windows.bat
 
 cache: