Rename Domain name for Maven

Can access to teaspoon's thread executor.

for next version

Merge branch 'master' of https://github.com/KoMinkyu/TeaSpoon

com.github.KoMinkyu domain changed to me.minkyu

gradle script modified.

add delay function on OnUi annotation.

change version name to 0.2.1

sample project modified.

changed version name for development release