Fuzzingtool

New features
* Added option to insert prefix and suffix on the payload;
* Added option to make a subdomain fuzzing;

Code refatored
* Separate the vulnerabilities verifications to a class `VulnValidator`;

Output changes
* Added an worked and not worked labels to be used with subdomain fuzzing mode;

To Do
* Increment the number of prefixes and suffixes seted (default only one for each);
* Option to save the output in other formats (like csv);
* Option to select allowed status code on response;

Ajusted a problem with thread handling

Code refatored
* Create a RequestParser to handle with argument parsing used in the requests;
* Create a CLIParser to handle with arguments given in the terminal;
* Create an ApplicationManager class to hold some methods that was present into Fuzzer class;
* Create a RequestException class to better handle with requests exceptions;
* Better encapsulation for the threads attributes and methods into the Fuzzer class;

Bugfixes
* Fixed a problem with proxies that aren't being used on the connection;
* Fixed a _core dumped_ fatal error when the user cancel the application that is using multithreading;

New features
* Show the elapsed time of the fuzzing test;
* Show the possible payloads at ending of the test;

Bugfixes
* Fixed a bug when you insert the variable $ on parameter;
* Updated the cookie setter for the new HTTP header content;
* Fixed the linestrip on OutputHandler for the verbose mode;
* Fixed the VulnerableValidator function that returns False on Time-Based SQLi;

Other
* Removed some unused getters and setters;

To Do
* Create a class Parser to be used on RequestHandler class;

New features
* Option to insert payload into the HTTP Header values;

New features
* Option to make the fuzzing tests with use of threads;
Opened issues
* [Time-based Blind SQLi testings aren't working with more than one thread.](https://github.com/NESCAU-UFLA/FuzzingTool/issues/1)