Small README fix
Removed invalid implode on string input.
Fixed exit code logic.
Added missing umask argument to chmod() method of FileSystemStack

Fixes "ERROR: Unsupported operand types" when providing more than two arguments.
Fixed func_get_args() missing defaults in commands when not explicitly passed
Merge pull request #74 from corpsee/master

Small README fix
Merge pull request #78 from Rarst/chmod-args-fix

Added missing umask argument to chmod() method of FileSystemStack
Merge pull request #76 from Rarst/semver-fixes

Fixed file read and exit code in semver task