the root C(c)content folder should be handled case insensitive

[stretyak]

the copying does not work on Linux some the packages where content root folder is specified in a different case than "Content"

for instance:

this one works fine:
packages\jQuery.UI.1.12.1.1\Content..

but this one does not work
packages\jsTree.3.1.1.2\content..

it happens because of different naming in "Content" and "content"