Save resque ppid in dataimport metadata
Fix #1526 by rescuing if log append fails
Merge pull request #1528 from CartoDB/dataimport_resque_ppid

Save resque ppid in dataimport metadata
Merge pull request #1529 from CartoDB/1526-Import_log_crashes_with_UTF-8_characters

Fix #1526 by rescuing if log append fails
Merge branch 'master' into issue-1312

Conflicts:
	app/models/data_import.rb