Update README.mdown

Properly hides the HUD at completion.
MBLabelAlignmentCenter doesn't need to be in header, could end up with multi-declaration of value
Fix typo in MBProgressHUD

Typo (or aggressive find/replace) caused an "x-axis" (correct)
and "y-ayis" (wot?).
Merge pull request #44 from tewha/patch-5

Fix typo in MBProgressHUD
Additional note regarding the Static library integration.
Performed recommended Xcode 4.6 project updates.
Updated license and added a LICENSE file.
Merge pull request #112 from coryallegory/master

MBLabelAlignmentCenter risk of being defined multiple times
Merge pull request #109 from dnstevenson/master

Fixed example in Readme
README cleanup and cocoapods instructions.
Added podspec for version 0.6.
Merge branch 'cocoapods'
Version bump and change log update.
Removed screenshot entries from the podspec.
A few documentation fixes.
Merge branch 'master' of git://github.com/jdg/MBProgressHUD