Removed deprecation errors in src/node.cc
Removed deprecation errors in src/node.cc

Removed constness on string litterals. This should cause no problem
since we're not modifying them.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,isaacs/nshtools,dreamllq/node,dreamllq/node,dreamllq/node