make creating SnapshotSpan from a range safe with debug diagnostics
Merge pull request #239 from vasily-kirichenko/span-from-pos-workaround

make creating SnapshotSpan from a range safe with debug diagnostics
Update docs for release
Updates for syntax coloring
Merge pull request #240 from dungpa/update-docs

Update docs for release
Merge branch 'fsprojects_release' into fsprojects_master