Update event doc from wiki

    update to grid table
    Cleaned up formatting to use `` instead of :code:
    Added Instructor Events and cleaned up outline
    Added instructor events. Cleaned up outline.
    Moved out correct_map table to addendum
    Removed deprecated/undocumented events

docs/data/source/index.rst

@@ -5,7 +5,7 @@
 
 edX Data Documentation
 ======================
-The following documents are targetted at those who are working with various data formats consumed and produced by the edX platform -- primarily course authors and those who are conducting research on data in our system. Developer oriented discussion of architecture and strictly internal APIs should be documented elsewhere.
+The following documents are targeted at those who are working with various data formats consumed and produced by the edX platform -- primarily course authors and those who are conducting research on data in our system. Developer oriented discussion of architecture and strictly internal APIs should be documented elsewhere.
 
 Course Data Formats
 -------------------