First draft of formal method page

src/content/formal_methods.md

+# Formal Methods
+
+<!-- [JB] Only content for now. Maybe add an intro ? -->
+## Alt-Ergo
+
+Alt-Ergo is an open-source automatic solver based on Satisfiability Modulo 
+Theories (SMT). Successfully designed for proving formulas generated in the
+context of deductive program verification.
+
+It is mostly used as a back-end of different program verification tools via
+the Why3 platform like Frama-C for C or SPARK for Ada. Alt-Ergo is also used
+to prove formulas issued from B modelizations and from cryptographic protocols
+verification. 
+
+<!-- [JB] I would be nice to promote such work but i don't know if it can be considered
+as a formal method work? By the way do we contribute to other stuff like that ? -->
+<!-- As Alt-Ergo maintainers, we also promote its evolution by contributing to
+projects like Dolmen. -->
+
+## Program Verification
+
+We developped several static analysis enforcing security or safety properties
+in various languages:
+- safety requirements in C <!-- [JB] can we mention MERCE and/or the related project? -->
+- OCaml exceptions tracking <!-- [JB] add SecureOCaml FUI link? -->
+- reaching unspecified or breaking invariant states in transition system based languages <!-- [JB] GEHC is under NDA so we can't talk explicitly about it but we may link to mikino/verification for dummies. -->
+

src/content/template.html

@@ -29,6 +29,9 @@
             <li class="nav-item">
               <a class="nav-link" href="/research-and-development">R&amp;D</a>
             </li>
+            <li class="nav-item">
+              <a class="nav-link" href="/formal_methods">Formal Methods</a>
+            </li>
             <li class="nav-item">
               <a class="nav-link" href="/startup_studio">Startup Studio</a>
             </li>