Stream.CopyTo replaced with our own CopyStream method. This allows us…

… to compile Ghostscript.NET for .NET 3.5 and lower.

Merge branch 'master' of https://github.com/jhabjan/Ghostscript.NET.git

fixed issue with the empty file path for the default viewer handler

v.1.1.8 release

fixed problem with the applying PDF page orientation for the Ghostscr…

…iptViewer and the GhostscriptRasterizer

Update README.md