Fixing badges in README
Fixing badges in README

The Markdown for badges in the README has newlines incorrectly separating the
images from the associated URL link, causing the link URLs to show up as text.
This removes the newlines so that the badges render properly.

aakselrod/lnd,LightningNetwork/lnd,ddustin/lnd,LightningNetwork/lnd,AndrewSamokhvalov/lnd,AndrewSamokhvalov/lnd,aakselrod/lnd,ddustin/lnd