unversion the .pc ??

[rurban]

remove the -3.4 from the .pc, to ease the integration into autotool projects. searching for safec. not safec-3.4, safec-3.3, safec-3.2 ...

See PR #56
versioning was added in the 2nd earliest commit after the sf fork, in 2012.
proper versioning helps in tighten the API to a specific version. "you only get what you asked for."
problem is that only the pkg-config .pc is versioned, (the lib anyway), but not the headers.
thus installing them in parallel will need to override the incdir and the -I path.

when adding the unversioned variant, name if libsafec.pc.

So there are four options:

1. keep the versioned safe-*.pc asis.
2. maintain two .pc's, a versioned and an unversioned. I'm leaning towards this one
3. remove the versioned .pc (as done in PR pkg-config: Rework pkg-config support to be usable #56).
4. add versioned headers also, into a seperate safec-x.y path.

[rurban]

Went with 3. for 3.5