Added new features

• new getVerticalMargin() can set the top/bottom dialog margin
• new getHorizontalMargin() can set the left/right dialog margin
• new getDialogBackground() can set the window dialog background

Improved Animations

• Improved enter/exit animations
• Customizable animation speed. Added isFastAnimation Method
• Documentation

Minor file naming improvements

v1.0.1

chore: rename animation file names

Stackable Dialog Fragment

v1.0

Create README.md