bug fix
fix layout
Merge branch 'master' of github.com:0x0c/M2DWebViewController
remove Podfile.lock
Draw arrow icons with UI graphics
Remove image assets from the project and podspec
Add a prefix to the UIImage category method
Merge pull request #3 from bcylin/bar-button-image

Draw bar button images with UIGraphics
update podfile
Merge branch 'master' of github.com:0x0c/M2DWebViewController
Rename M2DArrowIconDirection
Merge pull request #4 from bcylin/fix-typo

Fix Typo
Merge branch 'master' of github.com:0x0c/M2DWebViewController
update podspec