Move version csv build function to appropriate list script.
Move download function to installation script.
Move offline list function to list script.
Move function determining current version to current script.
Move zip validation function to install script.
Move upgrade availability check to selfupdate script.
Fix typo in run.sh
Small fix in README.
Fix candidates is empty on tmux
Further improvements on candidate list for multi init environments.
Up version to 1.3.1