Add new floodgap license

[pombredanne]

Add Floogap license from http://www.floodgap.com/software/ffsl/ by @classilla

It used in the wild:

• https://github.com/search?q="Floodgap+Free+Software+License"&type=code
• https://www.google.com/search?q="Floodgap Free Software License"&pws=0&gl=us&gws_rd=cr#gws_rd=cr&ip=1

Reported by @pabs3

[DennisClark]

@AyanSinhaMahapatra please synchronize with this new license, ffsl-1

https://enterprise.dejacode.com/licenses/nexB/ffsl-1/

[AyanSinhaMahapatra]

Added, closing!