#Custom duration for showIn and dismissOut

[JonyFang]

Can override animation duration.

// Overrides animation duration for show in.
@property (nonatomic, assign) CGFloat showInDuration;

// Overrides duration for dismiss.
@property (nonatomic, assign) CGFloat dismissOutDuration;

[waterskier2007]

The changes to the pbxproj should not be a part of the request

[JonyFang]

I have recovered the changes to the pbxproj.😋

[waterskier2007]

@JonyFang, looks good, however we will have to wait for @jmascia to approve the pull