Use AppVeyor cache for gems and bundle

Author: sodabrew

appveyor.yml

@@ -29,5 +29,15 @@ environment:
     - ruby_version: "200-x64"
     - ruby_version: "21"
     - ruby_version: "21-x64"
+cache:
+  - vendor
+  - C:\Ruby200\lib\ruby\gems\2.0.0
+  - C:\Ruby200\bin
+  - C:\Ruby200-x64\lib\ruby\gems\2.0.0
+  - C:\Ruby200-x64\bin
+  - C:\Ruby21\lib\ruby\gems\2.1.0
+  - C:\Ruby21\bin
+  - C:\Ruby21-x64\lib\ruby\gems\2.1.0
+  - C:\Ruby21-x64\bin
 services:
   - mysql

tasks/vendor_mysql.rake

@@ -22,7 +22,7 @@ file "vendor/#{CONNECTOR_DIR}/include/mysql.h" => ["vendor/#{CONNECTOR_ZIP}"] do
   full_file = File.expand_path(t.prerequisites.last)
   when_writing "creating #{t.name}" do
     cd "vendor" do
-      sh "unzip #{full_file} #{CONNECTOR_DIR}/bin/** #{CONNECTOR_DIR}/include/** #{CONNECTOR_DIR}/lib/**"
+      sh "unzip -uq #{full_file} #{CONNECTOR_DIR}/bin/** #{CONNECTOR_DIR}/include/** #{CONNECTOR_DIR}/lib/**"
     end
     # update file timestamp to avoid Rake perform this extraction again.
     touch t.name