add description to ecogesture

docs/ecolyo/functionalities/ecogesture.md

 # Ecogesture
 
+## Description
+
+An ecogesture is a gesture that encourages user to take action for reduce their own consumption.
+
+It includes different information such as icon, name, long and short description, its efficiency on the consumption and which fluid is affected.
+
+Also, an ecogesture can be used for an action challenge.
+
 ## All ecogestures screen
 
 This screen display the full list of ecogestures. User can filter ecogesture by usage.
 
 ## Ecogestures filtered by profile
 
-This screen display is based on a filtered ecogesture list that fit to the user profile type. 
+This screen display is based on a filtered ecogesture list that fit to the user profile type.
 The user can also filter ecogesture by usage.
 
 Following rules are used to filter the ecogesture:
@@ -22,12 +30,15 @@ OR
 - the ecogesture has gas fluid and profile type has an individual heating which use gas fluid.
 
 ### Case ecogesture usage is ECS
->`ECS = Eau chaude sanitaire`
+
+> `ECS = Eau chaude sanitaire`
 
 We will display the ecogesture if:
+
 - the ecogesture has electricity fluid and profile type has an individual hot water which use electricity fluid.
 
 OR
+
 - the ecogesture has gas fluid and profile type has an individual hot water which use gas fluid.
 
 ### Case ecogesture usage is ECS
@@ -50,4 +61,4 @@ We will display the ecogesture.
 
 ### Case ecogesture usage is air conditioning
 
-We will NOT display the ecogesture.
\ No newline at end of file
+We will NOT display the ecogesture.