fix arm 64 compiling error
Merge pull request #186 from holyman2k/master

fix arm 64 compiling error
Update MBProgressHUD.m

Cancel scheduled task when -done called to fix memory issues.
Merge pull request #192 from liuyaodong/patch-1

Canceling scheduled method calls inside `done`.
Add Xcode suggested GCC_WARN_64_TO_32_BIT_CONVERSION warning to Demo project
Merge pull request #199 from rivera-ernesto/add_suggested_warning_check

Add Xcode suggested GCC_WARN_64_TO_32_BIT_CONVERSION warning to Demo project
Merge pull request #2 from jdg/master

updates from upstream