Change title heading level for API doc

doc/api-task-procedures.markdown

@@ -1,7 +1,7 @@
 API Task Procedures
 ===================
 
-### createTask
+## createTask
 
 - Purpose: **Create a new task**
 - Parameters:
@@ -61,7 +61,7 @@ Response example:
 }
 ```
 
-### getTask
+## getTask
 
 - Purpose: **Get task by the unique id**
 - Parameters:
@@ -128,7 +128,7 @@ Response example:
 }
 ```
 
-### getTaskByReference
+## getTaskByReference
 
 - Purpose: **Get task by the external reference**
 - Parameters:
@@ -192,7 +192,7 @@ Response example:
 }
 ```
 
-### getAllTasks
+## getAllTasks
 
 - Purpose: **Get all available tasks**
 - Parameters:
@@ -291,7 +291,7 @@ Response example:
 }
 ```
 
-### getOverdueTasks
+## getOverdueTasks
 
 - Purpose: **Get all overdue tasks**
 - Result on success: **List of tasks**
@@ -337,7 +337,7 @@ Response example:
 }
 ```
 
-### getOverdueTasksByProject
+## getOverdueTasksByProject
 
 - Purpose: **Get all overdue tasks for a special project**
 - Result on success: **List of tasks**
@@ -386,7 +386,7 @@ Response example:
 }
 ```
 
-### updateTask
+## updateTask
 
 - Purpose: **Update a task**
 - Parameters:
@@ -430,7 +430,7 @@ Response example:
 }
 ```
 
-### openTask
+## openTask
 
 - Purpose: **Set a task to the status open**
 - Parameters:
@@ -461,7 +461,7 @@ Response example:
 }
 ```
 
-### closeTask
+## closeTask
 
 - Purpose: **Set a task to the status close**
 - Parameters:
@@ -492,7 +492,7 @@ Response example:
 }
 ```
 
-### removeTask
+## removeTask
 
 - Purpose: **Remove a task**
 - Parameters:
@@ -523,7 +523,7 @@ Response example:
 }
 ```
 
-### moveTaskPosition
+## moveTaskPosition
 
 - Purpose: **Move a task to another column, position or swimlane inside the same board**
 - Parameters:
@@ -561,7 +561,7 @@ Response example:
 }
 ```
 
-### moveTaskToProject
+## moveTaskToProject
 
 - Purpose: **Move a task to another project**
 - Parameters:
@@ -598,7 +598,7 @@ Response example:
 }
 ```
 
-### duplicateTaskToProject
+## duplicateTaskToProject
 
 - Purpose: **Move a task to another column or another position**
 - Parameters: