Use int_to_Integer on statements (issue 3310)
Fix issue 3357

For unpicklable globals, Live compares the new globals dict
with the old one to determine what variables the statement created.
For some reason the old dict was being created before the pickled
variables were reinitialized; therefore, Live thought all globals
were created by the statement and would clear them.
Check for SyntaxError before transforming int
Merge pull request #68 from lidavidm/improvements

Bugfixes