Corrected project reference issue, detected by Visual Studo 2013, when solution was opened and rebuild
Added support for log4Net v1.2.12
Reverted to using the 20 rather than 35 build output directory
Switched back to referencing log4net lib\2.0 rather than lib\3.5 as is the case for existing projects
Corrected comment to extend range to include log4net v1.2.12