Make "/ovale version" print the version number of the project.

diff --git a/Ovale.lua b/Ovale.lua
index 9eec4bf..0d32e01 100644
--- a/Ovale.lua
+++ b/Ovale.lua
@@ -32,6 +32,9 @@ local OVALE_TRUE_STRING = tostring(true)
 --</private-static-properties>

 --<public-static-properties>
+-- Project version number.
+Ovale.version = "@project-version@"
+-- Localization string table.
 Ovale.L = L
 --The table of check boxes definition
 Ovale.casesACocher = {}
diff --git a/OvaleOptions.lua b/OvaleOptions.lua
index 4ef4d92..d61e0bf 100644
--- a/OvaleOptions.lua
+++ b/OvaleOptions.lua
@@ -22,6 +22,7 @@ local OvaleScripts = nil
 local OvaleSpellBook = nil
 local OvaleState = nil

+local format = string.format
 local strgmatch = string.gmatch
 local strgsub = string.gsub
 local tostring = tostring
@@ -702,6 +703,12 @@ local self_options =
 					type = "execute",
 					func = function() Ovale.Profiler:Info() end,
 				},
+				version = {
+					order = -14,
+					name = "Show version number",
+					type = "execute",
+					func = function() Ovale:Print(Ovale.version) end,
+				},
 			},
 		},
 	},