Backmerge of last trunk modifications

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/alphashapes@625 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 8729c94e37923be0bbf943513025e7362807f041

1 files changed, 19 insertions, 14 deletions

diff --git a/src/common/doc/main_page.h b/src/common/doc/main_page.h
index 83908905..315aa0ac 100644
--- a/src/common/doc/main_page.h
+++ b/src/common/doc/main_page.h
@@ -6,7 +6,8 @@
 The Gudhi library (Geometric Understanding in Higher Dimensions) is a generic C++ library for 
 topological analysis of high-dimensional data whose goal is to provide robust, efficient, flexible and easy to use 
 implementations of 
-state-of-the-art algorithms and data structures for computational topology. 
+state-of-the-art algorithms and data structures for computational topology.
+This library is part of the <a href="https://project.inria.fr/gudhi/">Gudhi project</a>.
 
 The current release of the library allows to use several data-structures for simplicial complexes :
 simplex tree, Hasse diagram or skeleton-blocker. Several  operations can then be done on top of these
@@ -17,48 +18,52 @@ We refer to
 \cite gudhilibrary_ICMS14
 for a detailed description of the design of the library.
 
+\section installation Gudhi installation
+
+As Gudhi is a header only library, there is no need to install the library.
+
+Examples of Gudhi headers inclusion can be found in \ref demos.
+
 
 \section compiling Compiling
 
-The library uses c++11 and requires Boost with version 1.48.0 or more recent :  http://www.boost.org/.
-It is a multiplaform library and compiles on Linux, Mac OSX and Visual Studio 2013. 
+The library uses c++11 and requires <a href="http://www.boost.org/">Boost</a> with version 1.48.0 or more recent.
+It is a multi-platform library and compiles on Linux, Mac OSX and Visual Studio 2013. 
 
 
 \subsection gmp GMP:
 The multi-field persistent homology algorithm requires GMP which is a free library for arbitrary-precision
-arithmetic, operating on signed integers, rational numbers, and floating point numbers
-The following examples require The GNU Multiple Precision Arithmetic Library (GMP) http://gmplib.org/
+arithmetic, operating on signed integers, rational numbers, and floating point numbers.
+
+The following examples require the <a href="http://gmplib.org/">GNU Multiple Precision Arithmetic Library</a> (GMP) 
 and will not be built if GMP is not installed:
   - Persistent_cohomology/rips_multifield_persistence
   - Simplex_tree/simplex_tree_from_alpha_shapes_3
 
-Having GMP version 4.2 or higher installed is recommended. This library can be obtained from http://gmplib.org/
+Having GMP version 4.2 or higher installed is recommended.
 
 \subsection cgal CGAL:
 CGAL is a C++ library which provides easy access to efficient and reliable geometric algorithms.
 
-The following example requires CGAL https://www.cgal.org/ and will not be built if CGAL is not installed:
+The following example requires the <a href="http://www.cgal.org/">Computational Geometry Algorithms Library</a> (CGAL) 
+and will not be built if CGAL is not installed:
   - Simplex_tree/simplex_tree_from_alpha_shapes_3
 
 Having CGAL version 4.4 or higher installed is recommended. The procedure to install this library according to
 your operating system is detailed here http://doc.cgal.org/latest/Manual/installation.html
 
-\section demos Demos and Examples
+\subsection demos Demos and examples
 
-To build the library, run the following in a terminal:
+To build the demos and libraries, run the following commands in a terminal:
 
 \verbatim
 cd /path-to-gudhi/
 mkdir build
 cd build/
-cmake -DCMAKE_BUILD_TYPE=Release ..
+cmake ..
 make
 \endverbatim
 
-
-
-
-
 \details 
 
 \copyright GNU General Public License v3.