Add build directory to .gitignore

Many people prefer to build out-of-source, especially in the ./build directory. This prevents it from being tracked by git.
Don't set game's size info in Patch and Data check
Merge pull request #742 from archshift/gitignore

Add build directory to .gitignore
Merge pull request #744 from tambry/DataPatchCheckFix

Don't set game's size info in Patch and Data check