Merge pull request #53 from nortikin/master

sync
Merge pull request #54 from nortikin/master

some streamlining in script_node
Merge pull request #55 from nortikin/master

sync
Future proof get socket type
Merge branch 'master' of https://github.com/ly29/sverchok
Length for both output and input
Check for connection
Merge pull request #138 from ly29/master

show len level 0 in input and output.