All versions of Vert Curve

Version 1.23, 02/22/14 -Graphic bug fixed Version 1.22, 02/22/14 -Fixed graphics for the case when bvc location is input Version 1.21, 02/21/14 -Minor changes to the documentation -Added graphics feature -Fixed up navigation -Fixed documentation zoom feature it no longer obscures the content -Fixed clear button functionality -Added feature input changes cause output to be cleared