Release 0.5.0

Feature:

• added clearable default setting
• added state handling to UIFile
• added UIFileInput component
• added input types to UIInput and moved some attributes to props for clarity
• added library version constant

Fix:

• fixed button focus
• improved fade transition customisability
• styling improvements
• added missing transition to input

Refactor:

• use library as plugin in demo board
• removed autofocus
• renamed icon
• config changes
• removed unnecessary css classes
• moved shim files