v0.3.4

Changelog

e60b832 Merge pull request #4 from kkga/fix-no-sessions
6c662f3 fix panic when no sessions are running #3
54c50a0 clean up naming
e0b95db allocate ready-to-use slice of session in list cmd
70fd7ff clean up error handling
0cb2cea minor
dffa368 move send switch case
4d5e822 use anonymous struct for env context
ab0c78a clean up Edit cmd
266d861 chech for config vars in Init
806d4fe scripts: add fzf history