Fixed bug #29 where ddg.save would print out NULL
Changed .ddg.is.simple to return false for lists

Fixed a bug in .ddg.loadhistory that caused it to fail if the last
line in the file was the timestamp.

Fixed a bug when processing outs.data parameter of ddg.procedure so 
that a variable name can be passed in as a name, not just a string.
Same thing for ddg.data.
Merge branch 'master' of https://github.com/blernermhc/RDataTracker

Conflicts:
	DESCRIPTION
	R/RDataTracker.R
Preliminary implementation of dynamic on/off console nodes
Documentation updates for preliminary ddg.console.{on/off} functions
If the history file is created, it will be deleted. Added a .ddg.is.set function to check for local ddg variables. Console node code seems to be working as expected
Fixed bug in ddg.is.functiondecl that was preventing it from
recognizing function declarations.

Added a function to convert lists to strings so that lists of S4
objects can be saved to text files.
Merged changes
Merge branch 'master' of https://github.com/blernermhc/RDataTracker

Conflicts:
	DESCRIPTION
We need to include index.html under the /inst/doc directory so that when building and installing the package, even if index.html is not automatically generated, it still exists
Don't ignore html files
Implemented default error catching functinality for snapshot nodes. The nod e number is now decreased after failures, and an RObject is saved to the file system. DDG Explorer is unaware of this object. Modifications to ddg.txt still needed.