[pkg] Fix Debian changelog

* remove upper case letters in package name
* distribution is unstable (precise is Ubuntu specific)

debian/changelog

-cubicweb-squareui (0.3.4-1) precise; urgency=low
+cubicweb-squareui (0.3.4-1) unstable; urgency=low
 
   * New upstream release. https://www.cubicweb.org/project/cubicweb-squareui/0.3.4
 
  -- Katia Saurfelt <katia.saurfelt@logilab.fr>  Tue, 27 May 2014 15:18:30 +0200
 
@@ -2,11 +2,11 @@
 
   * New upstream release. https://www.cubicweb.org/project/cubicweb-squareui/0.3.4
 
  -- Katia Saurfelt <katia.saurfelt@logilab.fr>  Tue, 27 May 2014 15:18:30 +0200
 
-Cubicweb-Squareui (0.3.3-1) precise; urgency=low
+cubicweb-squareui (0.3.3-1) unstable; urgency=low
 
   * New upstream release. https://www.cubicweb.org/project/cubicweb-squareui/0.3.3
 
  -- Katia Saurfelt <katia.saurfelt@logilab.fr>  Fri, 11 Apr 2014 14:43:12 +0200
 
@@ -8,11 +8,11 @@
 
   * New upstream release. https://www.cubicweb.org/project/cubicweb-squareui/0.3.3
 
  -- Katia Saurfelt <katia.saurfelt@logilab.fr>  Fri, 11 Apr 2014 14:43:12 +0200
 
-cubicweb-squareui (0.3.2-1) precise; urgency=low
+cubicweb-squareui (0.3.2-1) unstable; urgency=low
 
   * New upstream release.
 
  -- Rémi Cardona <remi.cardona@logilab.fr>  Wed, 02 Apr 2014 17:11:33 +0200
 
@@ -14,11 +14,11 @@
 
   * New upstream release.
 
  -- Rémi Cardona <remi.cardona@logilab.fr>  Wed, 02 Apr 2014 17:11:33 +0200
 
-cubicweb-squareui (0.3.1-1) precise; urgency=low
+cubicweb-squareui (0.3.1-1) unstable; urgency=low
 
   * New upstream release.
 
  -- Rémi Cardona <remi.cardona@logilab.fr>  Wed, 19 Mar 2014 12:32:11 +0100
 
@@ -20,11 +20,11 @@
 
   * New upstream release.
 
  -- Rémi Cardona <remi.cardona@logilab.fr>  Wed, 19 Mar 2014 12:32:11 +0100
 
-cubicweb-squareui (0.3.0-1) precise; urgency=low
+cubicweb-squareui (0.3.0-1) unstable; urgency=low
 
   * New upstream release.
 
  -- Rémi Cardona <remi.cardona@logilab.fr>  Fri, 14 Mar 2014 11:35:43 +0100
 
@@ -26,9 +26,9 @@
 
   * New upstream release.
 
  -- Rémi Cardona <remi.cardona@logilab.fr>  Fri, 14 Mar 2014 11:35:43 +0100
 
-cubicweb-squareui (0.2.1-1) precise; urgency=low
+cubicweb-squareui (0.2.1-1) unstable; urgency=low
 
   * New upstream release
   * Fix dependency on cubicweb-web instead of cubicweb-common