1. drop semver related code with no need to detect node version
2. drop license declaration in log4js.js for there is one in the project dir
3. other changes
In the original version, the following operation looks synchronic, however it is not:
```
res.end = end;
res.end(data,enc);
//emit the log entry
```
In fact, it starts a series of async operations, in which the request may yet be changed after the request log has already been emitted
(in our case - a change on request headers was observed, probably by some low level hook or hacky wrap of some http.ServerResponse method that's involved on the process - but called asynchronously)
what leads to situation that the request log does not capture valid data.
(observed by us:
- request headers
- calculated end time, when concerning big content
)
The fix just used `setTimeout(function() { /*emit the log entry*/ }, 1)`, but I'm afraid it may not hold true for big contents.
Well. maybe the headers part will, but the response time calculation will lie.
The fix relays on: http://nodejs.org/api/http.html#http_event_finish
