Merge out from master.
Merge branch 'callDefaultConstructors' of https://github.com/hildeth/chapel into callDefaultConstructors
Add .readFE() and .readFF() as necessary to get additional tests working.

This is a workaround for my disabling the code that inserts "statement-level symbols" for
sync and single variables.  Before work on this branch is complete, I'll find a proper
solution that provides the syntactic sugar for
  var y$: sync int;
  var i$: single int;
  ...
  y$; // replaced by ==> y$.readFE();
  i$; // replaced by ==> i$.readFF();

Now only 1 regression remains.
Remove unintentionally added files.