Columns and loops can now be entered in one step as var = val, val, ...

- moved definition of expr_result from expr.c to fpd.y
- new header file fpd.h with all the things fpd.l and fpd.y export
- edit_var already calls edit_nothing, so there's no need to call it before
- added rapid entry option for loops, variables, and columns: var = val, ...



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5459 99fdad57-331a-0410-800a-d7fa5415bdb3

TODO

@@ -26,6 +26,7 @@ Bugs:
 - default silk width has no business being hard-coded in obj.c
 - undelete only works if not much has changed since the deletion
 - focus should return to canvas if nobody else wants it
+- whenever we call parse_* for input parsing, we may leak lots of expressions
 
 Code cleanup:
 - merge edit_unique with edit_name