support following filters:

  begin     Begin with the line that matches
  count     Count number of lines which match regexp
  exclude   Exclude lines that match
  include   Include lines that match
  section   Filter a section of output


ex, 

 ios.show_run :section=>'line'
 ios_show_run :include=>'address'
Version bump to 0.0.10
Cisco IOS default banner gets in the way of login.
add a gemspec file so I can use this library in my project
add module for nexus switches and routers. tested executing from shell
and config. all tests done as admin user. will test for regular user
later.