Improve README about lcurse

[ephraim]

Yeah! Would be nice to have! So do it, please!

Cheers Ephraim

[puittenbroek]

I couldn't get it to work to begin with due to lack of README. Chicken-egg problem :P
Pointing to something that might give tips/help would help as well.

[timwienk]

I fixed some issues in #84 .

There doesn't seem to be any additional configuration needed, other than that the URL of the addon has to end in ".git".

Regarding the symlinks, I can't be sure (it's not my README text), but it probably mentions this because it git clones the addons into a directory named after the URL (i.e. if the repository is https://github.com/ephraim/lcurse.git, the directory will be named lcurse). If the name of the repository does not exactly match the name of the addon, it'll have to be symlinked to the correct name.

[puittenbroek]

I wouldn't know where to perform the git clone to begin with. That would be a first step in a proper readme. I work fulltime as a software developer, so no technical skills are missing. But not in the mood to read source code to figure out where I should perform my commands..