Merge pull request #33 from mmensuali/optimizations

Optimizations
Merge remote-tracking branch 'upstream/v2014.1' into v2014.1
Fixed conflicts
Added basic infrastructure
Fixed conflicts step 2
Parsing is now on 'show running-config' command
Added DNS lookup method read()
Feature extended to ATS device
Added name server list management
Fixed pep8 inconsistencies
Fixed exception error messages
mock module imported only for tox tests
fixed mock module issue
Moved _d to _device
Added pep8 compliance check in setup.py
Restored sleep time for ntp feature tests
Extended timeout in case of file deletion
Fixed pep8 compliance check
Added ntp tests with host name
Tweaked mock for ntp tests