Re-arranged some emotions and support copy-to-clipboard in MS Windows

Hello. I made some improvements (●⌒⌒●)

- added `--gbk` options for windows clipboard copying  ( Usage: `o3o smile --gbk|clip` )

- combined two 'happy' categories

- separate '><' emotions

- corrected some typo mistake in keywords

- a keyword can appear in multiple categories now :)