Make CustomKeyboard and EmojiKeyboard subspecs

[cemolcay]

Separte KeyboardLayoutEngine Core
Make CustomKeyboard along with

• multilanguage,
• sound effect,
• KeyPop,
• KeyMenu,
• Extra buttons on long press,
• Double space to point,
• Autocapitalization
• Prediction support

Make EmojiKeyboard with

• https://github.com/cruzdiego/HorizontalFloatingHeaderLayout pod
• https://bitbucket.org/grumdrig/emoji-list/src/5244e8fd028ef6f191cd0819dc3af168b6db5ec1/emoji.js?at=master&fileviewer=file-view-default