add a preliminary README file.

README

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+++=================++
+|| I. Introduction ||
+++=================++
+
++----------------------
+| I.a. What is StarPU ?
+
+StarPU is a runtime system that offers support for heterogeneous multicore
+machines. While many efforts are devoted to design efficient compute kernels
+for those architectures (eg. to implement BLAS kernels on GPUs or on Cell's
+SPUs), StarPU not only takes care to offload such kernels (and to implement
+data coherency accross the machine), but it also makes sure the kernels are
+executed as efficiently as possible.
+
++------------------------
+| I.b. What StarPU is not
+
+StarPU is not a new langage, and it does not extends existing langages either.
+StarPU does not help to write compute kernels.
+
++---------------------------------
+| I.c. (How) Could StarPU help me?
+
+TODO
+
+++==================++
+|| II. Requirements ||
+++==================++
+
+ * make
+ * gcc (version >= 4)
+ * if CUDA support is enabled
+   * CUDA (version >= 2.0)
+   * CUBLAS (version >= 2.0)
+ * extra requirements for the svn version
+   * autoconf (version >= 2.60)
+
+++=====================++
+|| III. Getting StarPU ||
+++=====================++
+
+StarPU is available on https://gforge.inria.fr/projects/starpu/.
+
+It is also possible to access the latest svn version:
+  $ svn checkout svn://scm.gforge.inria.fr/svn/starpu/trunk/
+or via http (DAV):  
+  $ svn checkout https://scm.gforge.inria.fr/svn/starpu/trunk/
+
+++=============================++
+|| IV. Building and Installing ||
+++=============================++
+
++---------------------------
+| IV.a. For svn version only
+
+  $ autoreconf
+
++------------------------
+| IV.b. For all versions:
+
+  $ ./configure
+  $ make
+  $ make install
+
+++============++
+|| V. Contact ||
+++============++
+
+For any questions regarding StarPU, please contact Cédric Augonnet
+(cedric.augonnet@inria.fr).