oAuthHandlePIN No longer working

```
What steps will reproduce the problem?
1. Run Twitter Client and attempt to use twitter client without visiting Twitter
2. Even when supplying a proper Username and Password the application will fail

What is the expected output? What do you see instead?
The TwitCurl uses the function oAuthHandlePIN to connect to twitter and submit
a signin/authorize form to Twitter with the username and password supplied.
Instead of returning a page with the pin encapsulated in:
code-desc">######, the form submit returns a page with:

You are being redirected.

What version of the product are you using? On what operating system?
Using Windows 7, and the latest source downloaded from GitHUB.

Please provide any additional information below.
It seems twitter may have updated this webpage because inorder to get TwitCURL
to find the Authenticity_Token and oAuthToken, I had to update
twitcurls.h
const std::string OAUTHLIB_TOKEN_END_TAG_TWITTER_RESP = "\" />";

to this:
const std::string OAUTHLIB_TOKEN_END_TAG_TWITTER_RESP = "\"/>";

```

Original issue reported on code.google.com by `cesar...@gmail.com` on 8 Apr 2015 at 2:35