DOCS-2311 create a custom role

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-2311: minor edit
DOCS-2312 change user password

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-2312 add user

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-2312: edits to tutorials
Add some additional homebrew instructions

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor: homebrew edits
Update write-concern.txt

grammar fix

Signed-off-by: Sam Kleinman <samk@10gen.com>
Update journaling.txt

Consistent use of "filesystem".

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-2312: add user tutorial
adding a link to fix half of DOCS-2434