[ref/contact] update contacts

- modify form's fields
- modify email addresses

html/contact.html

@@ -66,12 +66,12 @@ function(err, data) {
 
 	  <div class="leftBlock">
 		<div class="inputWrap">
-		  <div class="textError"></div><input type="text" name="name" placeholder="Name" class="textbox" data-parsley-required=
+		  <div class="textError"></div><input type="text" name="name" placeholder="Your name" class="textbox" data-parsley-required=
 		  "" data-parsley-pattern="^[a-zA-Z_ ]+$" data-parsley-errors-container=".textError">
 		</div>
 
 		<div class="inputWrap">
-		  <div class="emailError"></div><input type="email" name="email" placeholder="Email" class="textbox"
+		  <div class="emailError"></div><input type="email" name="email" placeholder="Your email" class="textbox"
 		  data-parsley-required="" data-parsley-errors-container=".emailError">
 		</div>
 
@@ -79,13 +79,13 @@ function(err, data) {
 		  <div class="radioError"></div><span>You are:</span>
 
 		  <p><input id="radio1" name="you_are" type="radio" value="An Academic" data-parsley-required=""
-		  data-parsley-errors-container=".radioError"> <label for="radio1">An Academic</label></p>
+		  data-parsley-errors-container=".radioError"> <label for="radio1">An academic</label></p>
 
 		  <p><input id="radio2" name="you_are" type="radio" value="An Industrial" data-parsley-required=""
 		  data-parsley-errors-container=".radioError"> <label for="radio2">An industrial</label></p>
 
 		  <p><input id="radio3" name="you_are" type="radio" value="An Applicant" data-parsley-required=""
-		  data-parsley-errors-container=".radioError"> <label for="radio3">An Applicant</label></p>
+		  data-parsley-errors-container=".radioError"> <label for="radio3">A candidate</label></p>
 		</div>
 	  </div>
 
@@ -121,8 +121,8 @@ function(err, data) {
 	  <p>If you think Frama-C could be part of any kind of scientific collaboration, including research projects, internships,
 	  PhDs, post-doctoral positions and dissemination activities,</p>
 
-	  <p><a href="mailto:florent.kirchner@cea.fr">Florent.Kirchner@cea.fr</a><small>|</small><a href=
-	  "mailto:loic.correnson@cea.fr">Loic.Correnson@cea.fr</a></p>
+	  <p><a href="mailto:florent.kirchner@cea.fr">florent.kirchner(at)cea.fr</a><small>|</small><a href=
+	  "mailto:loic.correnson@cea.fr">loic.correnson(at)cea.fr</a></p>
 	</div>
 
 	<div class="usefulLinks" id="side-content">