Start adding Web Session test.

(cherry picked from commit a7ff942c9b31cc0ca6332cc65ed629155850742c)
refs #2918 HTML5 export function has been udapted to support all platforms.

(cherry picked from commit d16b618fa9eb596cd7b1f0cead00c2a69696e54b)
refs #2918 Fixed Windows file separator problem for HTML5 export.

(cherry picked from commit 76774f22e5145c393efb4e5c988642c2f16e1a3a)
fixes #2918 Fixed simple and full web export function for all platforms.

(cherry picked from commit bfeca67bdec28e642058b10f01808b59c226908a)