Removes logging of GCT files from xmodule.

Just that.
Adds install to travis script.

This is required for the C compiler to find dialects.
Creates rtobjectdraw by scripting.

Adds the make-rt-version script, and Makefile targets.
Corrects bug in requireTypes dialect.

Tim found that this dialect was examining the decType of a
parameter without first checking that it was an identifier and
not a wildcard.  However, he seems never to have added this
fix to the repository.

This is apb’s attempt to re-do the fix.
Improves error messages for dialects.

Change exception control flow so that when a dialect
fails to load or crashes we get appropriate error messages,
distinct from when the dialect’s checker finds a problem in
the code.

Also adds a test (t161) for a dialect.
Puts staticTypes and requireTypes in the list of modules
loaded into the web browser on startup.