fix doc
add the doc the movie page
fix doc
add doc about base and game directorys
add the doc the define statement
add the doc the page about label
move renpy.rollback from other to rollback
move renpy.call from other to statement_equivalents
fix movie
add the doc persistent data
fix doc
add the doc about pause statement
add doc about special labels
add doc about init statement
Merge pull request #188 from kyouryuukunn/add_doc3

More documentation from kyouryuukunn