Windows8 - Fix header licenses (Apache RAT report)

JavaDocs are generated and so license header is optional
Generated files do not required license headers
Add a .ratExcludes file for files to exclude

42 Unknown Licenses
*******************************

Unapproved licenses:

./README.md
./windows7/Cordova.sln
./windows7/Cordova/Cordova.vcxproj
./windows7/Cordova/Cordova.vcxproj.filters
./windows7/Cordova/lib/js/exec.js
./windows7/Cordova/lib/js/platform.js
./windows7/Cordova/lib/js/plugin/win7/SQLError.js
./windows7/Cordova/lib/js/plugin/win7/device.js
./windows7/Cordova/lib/js/plugin/win7/jsHandler.js
./windows7/Cordova/lib/js/plugin/win7/storage.js
./windows7/Cordova/lib/sqlite/sqlite3.c
./windows7/Cordova/lib/sqlite/sqlite3.h
./windows7/Cordova/www/accel_game.css
./windows7/Cordova/www/accel_game.html
./windows7/Cordova/www/accel_game.js
./windows7/Cordova/www/capture.html
./windows7/Cordova/www/device.html
./windows7/Cordova/www/events.html
./windows7/Cordova/www/file.html
./windows7/Cordova/www/index.html
./windows7/Cordova/www/network.html
./windows7/Cordova/www/notification.html
./windows7/Cordova/www/storage.html
./windows8/CONTRIBUTING.md
./windows8/bin/check_reqs.bat
./windows8/bin/create.bat
./windows8/bin/update.bat
./windows8/template/CordovaApp.jsproj
./windows8/template/CordovaApp.sln
./windows8/template/MyTemplate.vstemplate
./windows8/template/package.appxmanifest
./windows8/template/cordova/build.bat
./windows8/template/cordova/clean.bat
./windows8/template/cordova/log.bat
./windows8/template/cordova/run.bat
./windows8/template/cordova/version.bat
./windows8/template/cordova/lib/list-devices.bat
./windows8/template/cordova/lib/list-emulator-images.bat
./windows8/template/cordova/lib/list-started-emulators.bat
./windows8/tests/testCreateProject.bat
./windows8/tooling/CordovaWindows8Deploy/CordovaWindows8Deploy.cpp
./windows8/tooling/CordovaWindows8Deploy/CordovaWindows8Deploy.vcxproj