Merge pull request #23 from pitpit/bugfix-22

fixing composer/composer dependency version
Merge branch 'master' of github.com:kohkimakimoto/altax into bugfix-22
Merge pull request #25 from pitpit/bugfix-22

mapping dev-master to 3.x milestone
First commit to support SSH Key password #24
Add test key files
Add Util class for cheking if a key file has passphrase.
Update comments
Modify test file name
Update
Fix comment
Implementing basic logic for asking passphrase.
added 'tasks' command
Updated method comments
Added missing space after colon
Merge pull request #28 from stekycz/ssh-password

tiny updates
Merge pull request #27 from pitpit/feature-tasks-command

added 'tasks' command
Fix displaying description in the tasks built-in command.
Implementing validation for passphrase of ssh key file.
Support ssh-agent
Update phar