Missing dependency libraries in setup document

[Ziemowit]

It is not a bug. Rather idea of improvement :)

To success call of "./configure --enable-experimental --enable-library" we need to install two more dependencies: libical-dev and libreadline-dev.

So maybe it would be worth to add this to "Requirements" paragraph?

[CheapB]

All the required libraries are listed in the guide document - but it is a good idea to update the requirement section of the read me as well