Changes since v0.1:

* Installs a .pc file

* Synchronizes .asn files with CDFF commit
  5a3e83c75932a622b85b3df0bc6b318576183bed. Main changes:

  * Map.asn rewritten

  * Most of sequences defined on Eigen.asn now have fixed sizes

  * New string type: StringN.

  * .asn files are now structured the same way as in CDFF