Added a license for the logo from @Nicd.

Fixed an accumulation of XP bug.

LICENSE

@@ -19,3 +19,36 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+
+
+The Code::Stats logo is licensed with CC BY-NC-ND 4.0:
+
+Copyright © 2016, Mikko Ahlroth
+
+The following is a summary of the CC BY-NC-ND 4.0 licence. Please see
+http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode for the full
+licence text.
+
+You are free to:
+
+Share — copy and redistribute the material in any medium or format
+The licensor cannot revoke these freedoms as long as you follow the license
+terms.
+Under the following terms:
+
+Attribution — You must give appropriate credit, provide a link to the license,
+and indicate if changes were made. You may do so in any reasonable manner, but
+not in any way that suggests the licensor endorses you or your use.
+NonCommercial — You may not use the material for commercial purposes.
+NoDerivatives — If you remix, transform, or build upon the material, you may
+not distribute the modified material.
+No additional restrictions — You may not apply legal terms or technological
+measures that legally restrict others from doing anything the license permits.
+Notices:
+
+You do not have to comply with the license for elements of the material in the
+public domain or where your use is permitted by an applicable exception or
+limitation.
+No warranties are given. The license may not give you all of the permissions
+necessary for your intended use. For example, other rights such as publicity,
+privacy, or moral rights may limit how you use the material.