Double var declaration fix for NailyFacts deploy
parametrized syntax checker

Scan the whole source tree when invoked without parameters, check
specified files when a list of files is passed in parameters.
Merge pull request #534 from warpc/double_var_declaration

Double var declaration fix for NailyFacts deploy
Copy and append key to authorized_keys for users
Merge pull request #541 from Zipfer/ssh_keys

Copy and append key to authorized_keys for users
Merge pull request #538 from xarses/syntax-check-parametrized

parametrized syntax checker