Merge pull request #40 from rsommer/patch-1

Generate default timestamp within "track" function call. Otherwise the t...
Update examples/dashboard/feed.py

Update the example to point to the updated leftronic URL for pushing data.
Release 1.0
Fixed an error in the export example.

Eddie Satterly found that when you run it twice without telling it to recover, it doesn't die when it should
throw an error about not recovering and not overwriting, but that gets clobbered by a later error where
open mode didn't get set properly.
Removed reference to error, per David Foster's comments.
Merge branch 'develop' of github.com:splunk/splunk-sdk-python into develop