Curl package updated

[Ondřej Čertík]

Hi,

Previously the Curl package depended on autotools, so also Qsnake
depended on autotools. I fixed it,
so now the only dependencies of Qsnake are:

* gfortran (>= 4.4, due to the ``iso_c_binding`` module)
* gcc, g++ (>= 4.2 should be enough)
* python (>= 2.5 should work)
* make (any version should work)

when thinking about it, it probably also depends on shell/bash and Perl.

I've also updated IPython to the latest version, so you can use the
latest IPython notebook from
Qsnake.

Ondrej