Icons for YATE, SFLphone, Fritzing, Kronometer, efax-gtk, knowthelist

Here are the first drafts:

YATE, Issue #1087
![yate](https://cloud.githubusercontent.com/assets/7050624/5046481/77849d86-6c0b-11e4-99ac-7e7a70461bf5.png)

SFLphone, Issue #1041 
![sflphone](https://cloud.githubusercontent.com/assets/7050624/5046494/a26dbdca-6c0b-11e4-9b1a-f99f0ca10d54.png)
That's the one in at the moment. Alternatively:
![sflphone_](https://cloud.githubusercontent.com/assets/7050624/5046500/c2c40f20-6c0b-11e4-8a99-c75d36377f97.png)

Fritzing, Issue #1097 
![fritzing](https://cloud.githubusercontent.com/assets/7050624/5046517/dd77ee0e-6c0b-11e4-8b75-41fbe7c74aea.png)

Kronometer, Issue #1032 
![kronometer](https://cloud.githubusercontent.com/assets/7050624/5046527/f4f9d07e-6c0b-11e4-81ce-fa765c241bda.png)

efax-gtk, Issue #1033 
![efax-gtk](https://cloud.githubusercontent.com/assets/7050624/5046532/066c9878-6c0c-11e4-992d-4132280c3a98.png)

Knowthelist, Issue #1144 
![knowthelist2](https://cloud.githubusercontent.com/assets/7050624/5046543/2b0f3d84-6c0c-11e4-9784-4191e9442c66.png)
Or alternatively:
![knowthelist1](https://cloud.githubusercontent.com/assets/7050624/5046549/342127d4-6c0c-11e4-9b6e-c3dec1c73ff6.png)

Not sure about Knowthelist. Maybe it's better to just symlink to an existing earphone icon.