DOC: Update links to the shared libraries

ldconfig fix the following error after a build:

```
$ faup
faup: error while loading shared libraries: libfaupl.so.1: cannot open shared object file: No such file or directory
```
DOC: Add FAQ

Add a question and answer to the FAQ: Why do I receive the error “libfaupl.so.1: cannot open shared object file” when trying to run faup?
Multithread stuff test only for Linux
Add test for bug shown in issue #33. That will help me validate we are ok or not.
Merge pull request #31 from 2xyo/master

DOC: Update links to the shared libraries
Merge pull request #32 from ant1/master

Respect DESTDIR and fix build with multiple make jobs
Add new files to track documentation / inspiration / sources etc.