Draft of LTI documentation

Another draft of LTI documentation, including a table of options
available in the Studio UI

docs/course_authors/source/common_problems.rst

@@ -376,9 +376,9 @@ To make the response case sensitive, change the value of the **type** attribute
       <textline size="20"/>
     </stringresponse>
     
-=========================================
+============================================
 Response Field Length of Text Input Problems
-=========================================
+============================================
 
 By default, the response field for text input problems is 20 characters long. 
 

docs/course_authors/source/create_problem_component.rst

@@ -204,6 +204,8 @@ Maximum Attempts
 This setting specifies the number of times a student can try to answer
 the problem. By default, a student has an unlimited number of attempts.
 
+.. _Problem Weight:
+
 ==============================
 Problem Weight
 ==============================