Recognising Epiphany as an indendant browser

Added 'EP' as a browser name, to be recognised on response.

core/main/constants/browsers.rb

@@ -15,6 +15,7 @@ module Constants
     IE      = 'IE'       # Internet Explorer
     E       = 'E'        # Microsoft Edge
     S       = 'S'        # Safari
+    EP      = 'EP'       # Epiphany
     K       = 'K'        # Konqueror
     C       = 'C'        # Chrome
     O       = 'O'        # Opera
@@ -30,6 +31,7 @@ module Constants
     FRIENDLY_IE_NAME  = 'Internet Explorer'
     FRIENDLY_E_NAME   = 'Microsoft Edge'
     FRIENDLY_S_NAME   = 'Safari'
+    FRIENDLY_EP_NAME  = 'Epiphany'
     FRIENDLY_K_NAME   = 'Konqueror'
     FRIENDLY_C_NAME   = 'Chrome'
     FRIENDLY_O_NAME   = 'Opera'
@@ -50,6 +52,7 @@ module Constants
         when IE;       return FRIENDLY_IE_NAME
         when E ;       return FRIENDLY_E_NAME
         when S ;       return FRIENDLY_S_NAME
+        when EP;       return FRIENDLY_EP_NAME
         when K ;       return FRIENDLY_K_NAME
         when C ;       return FRIENDLY_C_NAME
         when O ;       return FRIENDLY_O_NAME