Solution of root launch problem

[chikuta]

Hi @SherifN .

Thank you for your excellent ros node.
It's been very helpful for us.

I found a solution about root problem.

peak_cam/README.md

Lines 45 to 47 in 053a5ae

	> Hint: Sometimes the cameras are only accesible as root. Try ` sudo -s` in your terminal and launch the node again.

In our case, we use network camera and PoE.
I checked packet with wireshark. After checking network packet, I found that It was caused by firewall.
Please try to disable firewall at ethernet port that connect cameras as follows.

ufw allow in on ethX to any

Of course, It not secure for network connection. Please configure correctly.

[chikuta]

Can I make pull request to README ?

[flynneva]

@chikuta of course!