better wording and package description in the ANNOUNCE for 1.6

etc/ANNOUNCE-1.6.md

@@ -7,36 +7,47 @@ version 1.6 for Coq 8.4pl6 and 8.5beta3.
 This release adds no new theory files.  The proof language 
 received minor fixes while the libraries received minor additions.
 
-The developmet is now happening in the public and is mirrored
-on github.  Another annoucment specific to this will follow shortly.
-
 A detailed ChageLog is available at:
   https://github.com/math-comp/math-comp/blob/master/etc/ChangeLog
 Such document contains the list of new theorems as well as the list
 of theorems that were renamed or replaced by more general variants.
 
-The main user visible change is that the library was split into the following components:
-
-  1. ssreflect: the ssreflect proof language and ...
-  2. fingroup: finite groups theory...
-  3. algebra: ..
-  4. solvable: ...
-  5. field: ...
-  6. character: ...
+The development is now taking place in the public and is mirrored
+on github.  Another announcement specific to this will follow shortly.
 
-A user not needing the entire library can build only the components she
-is interested in.  Each component comes with a file one can Require and Import to load, at once, the entire component.  For example "Require Import all_ssreflect." loads all the theory files in the ssreflect component.
+The main user visible change is that the library was split into the following components:
 
-The main incompatibility concerning users is the change of logical/phisical path implied by the reorganization of the library.  In particular "Require Ssreflect.ssreflect" does not work anymore.  We propose a schema
-that is compatible with both Coq 8.4 and Coq 8.5, namely:
+  1. ssreflect: Ssreflect proof language, lists, boolean predicates, natural
+     numbers, types with a decidable equality, finite types, finite sets, finite
+     functions, finite graphs, basic arithmetics and prime numbers, big operators
+  2. fingroup: finite groups, group quotients, group morphisms, group
+     presentation, group action
+  3. algebra: discrete algebraic structures as ring, fields, ordered fields,
+     real fields, modules, algebras, vector spaces and integers, rational
+     numbers, polynomials, matrices, vector spaces
+  4. solvable: more definitions and theorems about finite groups
+  5. field: field extensions, Galois theory, algebraic numbers, cyclotomic
+     polynomials
+  6. character: group representations, characters and class functions
+
+A user not needing the entire library can build only the components she is
+interested in.  Each component comes with a file one can Require and Import to
+load, at once, the entire component.
+For example "Require Import all_ssreflect." loads all the theory files in the
+ssreflect component.
+
+The main incompatibility concerning users is the change of logical/physical
+path implied by the reorganization of the library.  In particular "Require
+Ssreflect.ssreflect" does not work anymore.  We propose a schema that is
+compatible with both Coq 8.4 and Coq 8.5, namely:
   Require Import mathcomp.ssreflect.ssreflect.
   From mathcomp Require Import ssrfun ssrbool ...
 The first line loads the ssreflect plugin using its full path.
-Then all other files are loaded from the mathcomp namespace.
-The component part (like ssreflect or algebra) can be safely omitted.
-All theory files in the library follow this schema.  Note that the
-From directive has effect only in Coq 8.5.  Coq 8.4 ignores it and
-searches for files in all known paths.  Beware of name collisions.
+Then all other files are loaded from the mathcomp name space.
+The component part (like ssreflect or algebra) is omitted.  All theory files in
+the library follow this schema.
+Note that the From directive has effect only in Coq 8.5.  Coq 8.4 ignores it
+and searches for files in all known paths.  Beware of name collisions.
 
 The tarball can be download at the following URL:
   http://ssr.msr-inria.inria.fr/FTP/mathcomp-1.6.tar.gz