[Alexandria-list] Backend re-implementation

[Laurent Sansonetti]

Hi folks,

The more I work with Ruby the more I am disappointed in its design and
performance issues.  Ruby is definitely not mature enough for building
programs that must be efficient with large collection of data (such as
Alexandria).

So I decided to re-implement the backend (so, all the files in
lib/alexandria/*.rb) in pure C.  I have already started to work on
library.rb, and I have completed more or less 30% of the work for now.

Stay tuned!

Laurent