Removed header checking and added office file types grouping exceptions when checking file spoofing [fixes SCI-418]
Removed header checking and added office file types grouping exceptions when checking file spoofing [fixes SCI-418]

Ducz0r/scinote-web,Ducz0r/scinote-web,Ducz0r/scinote-web,mlorb/scinote-web,mlorb/scinote-web,mlorb/scinote-web