Merge pull request #539 from ximenesuk/clarify-pytest

Clarify pytest options
Add paragraph about Ice 3.5 server not supported under Windows
Add note about Windows Ice 3.5 clients
Improve description of Ice 3.5 limitation
Describe 0.4.0 improvements for scc unrebased-prs
Document new --check-commit-status option
Add description of new scc check-status command
Fix minor points from PR review.
Add section on -DMARK build option.
Fix typo
merge develop -D org -I include -E exclude: PR 533 (Removing BF anchor until it exists)
merge develop -D org -I include -E exclude: PR 543 (Add paragraph about Ice 3.5 server not supported under Windows (rebased onto develop))
merge develop -D org -I include -E exclude: PR 544 (Clarify pytest fixes and additions (rebase))
merge develop -D org -I include -E exclude: PR 545 (Document changes in scc 0.4.0)