Notification of string changes

Author: Kyle Temkin
MDL-39756 add advanced attachment options to essay question type
Adds a set of options to the essay question type which implement
the following new features:

-Adds an input format which accepts only file uploads, and no
inline text.
-Adds an option to make the inline text response optional when
attachments are enabled, so students can choose to upload
an essay file.
-Adds an option to make attachments required, so essays without
attachments will be marked incomplete.


http://git.moodle.org/gw?p=moodle.git;a=commit;h=a4f765eb1d9ace5c0451e9946b33b8c9bd82381f
http://github.com/moodle/moodle/commit/a4f765eb1d9ace5c0451e9946b33b8c9bd82381f

+ 2.7 en [attachmentsoptional,qtype_essay]
+ 2.7 en [attachmentsrequired,qtype_essay]
+ 2.7 en [attachmentsrequired_help,qtype_essay]
+ 2.7 en [formatnoinline,qtype_essay]
+ 2.7 en [graderinfoheader,qtype_essay]
+ 2.7 en [mustattach,qtype_essay]
+ 2.7 en [mustrequire,qtype_essay]
+ 2.7 en [mustrequirefewer,qtype_essay]
+ 2.7 en [responseoptions,qtype_essay]
+ 2.7 en [responserequired,qtype_essay]
+ 2.7 en [responsenotrequired,qtype_essay]
+ 2.7 en [responseisrequired,qtype_essay]
+ 2.7 en [responsetemplateheader,qtype_essay]