Update CHANGELOG.md
Removed unrelated Tutorials
Added Speaker Identification Field Toolkit (SIFT)
Added Master Thesis: MITM-Attack on GSM by Adam Kostrzewa
Added IMSI-Catcher Disclosure Request
Added Surveillance Catalogue by NeoSoft AG
fixed overlapping of AT Command Injector and About page
Merge pull request #144 from tobykurien/master

Fixed overlapping of AT Command Injector and About page
Update README.md