For Travis CI - initial attempt to switch on the database subsystem.

Rakefile

@@ -499,7 +499,7 @@ def makefile_ci
     jit = 'JIT'
     amalg = '-DURHO3D_LUAJIT_AMALG=1'
   end
-  system "./cmake_generic.sh ../Build #{$build_options} -DURHO3D_LUA#{jit}=1 #{amalg} -DURHO3D_SAMPLES=1 -DURHO3D_TOOLS=1 -DURHO3D_EXTRAS=1 -DURHO3D_TESTING=#{$testing} -DCMAKE_BUILD_TYPE=#{$configuration}" or abort 'Failed to configure Urho3D library build'
+  system "./cmake_generic.sh ../Build #{$build_options} -DURHO3D_DATABASE_SQLITE=1 -DURHO3D_LUA#{jit}=1 #{amalg} -DURHO3D_SAMPLES=1 -DURHO3D_TOOLS=1 -DURHO3D_EXTRAS=1 -DURHO3D_TESTING=#{$testing} -DCMAKE_BUILD_TYPE=#{$configuration}" or abort 'Failed to configure Urho3D library build'
   if ENV['AVD'] && !ENV['PACKAGE_UPLOAD']   # Skip APK test run when packaging
     android_prepare_device ENV['API'], ENV['ABI'], ENV['AVD'] or abort 'Failed to prepare Android (virtual) device for test run'
   end
@@ -651,7 +651,7 @@ def xcode_ci
     amalg = '-DURHO3D_LUAJIT_AMALG=1'
     deployment_target = "-DCMAKE_OSX_DEPLOYMENT_TARGET=#{ENV['DEPLOYMENT_TARGET']}"
   end
-  system "./cmake_macosx.sh ../Build -DIOS=$IOS #{deployment_target} #{$build_options} -DURHO3D_LUA#{jit}=1 #{amalg} -DURHO3D_SAMPLES=1 -DURHO3D_TOOLS=1 -DURHO3D_EXTRAS=1 -DURHO3D_TESTING=#{$testing}" or abort 'Failed to configure Urho3D library build'
+  system "./cmake_macosx.sh ../Build -DIOS=$IOS #{deployment_target} #{$build_options} -DURHO3D_DATABASE_SQLITE=1 -DURHO3D_LUA#{jit}=1 #{amalg} -DURHO3D_SAMPLES=1 -DURHO3D_TOOLS=1 -DURHO3D_EXTRAS=1 -DURHO3D_TESTING=#{$testing}" or abort 'Failed to configure Urho3D library build'
   xcode_build(ENV['IOS'], '../Build/Urho3D.xcodeproj') or abort 'Failed to build or test Urho3D library'
   unless ENV['CI'] && ENV['IOS'] && ENV['PACKAGE_UPLOAD']   # Skip scaffolding test when packaging for iOS
     # Create a new project on the fly that uses newly built Urho3D library in the build tree