Update dependencies

express updated to ~4.0
async updated to ~0.8
yargs updated to ~1.2.1 (checked automatic dashed-to-camel key
conversion)
Fixed passing inspector's 'no-' arg in node-debug
Passing NodeJS options to debugged process. Close #328

Added 'nodejs' option to node-debug.
Detecting Windows CMD files. Close #323

If debugged target found and has '.cmd' extension, inspector tries to
find real link in this cmd.
front-end: removed duplicate function

Removed the function defined twice, on line 74 and line 231.

This change fixed node-inspector in the Safari browser.
Non-ascii sctring saving fix

Before saving string on disc (which probably work very well), we
send it in node with "Content-Length" header. Probably ".length" operator
gives wrong number if string contains non-ascii chars (smaller, than it must be).
test: cleanup after the previous commit

Move the test for non-ASCII requests to test/DebuggerClient,
make it independent on the script id values assigned by V8.
Update AUTHORS
Update for v0.7.4
start work on v0.7.5
Injector API

Injector presents a communication bridge between app and debugger.
It provide the access to:
  1. 'require' function (that isn't global and rarely scoped)
  2. socket connection (that used V8 debugger protocol in messages)
    as to main communication channel between app and debugger.
It will be useful for injection of plugins and extentions.
It is first part of 'Console Implimentation' extention.
Bump up the next version to 0.8.0
Removed trailing space.
Fir InjectorServer socket closing

Closes #390