Merge pull request #49 from greenTara/master

adding or editing tool tips in RNC
Update README.md

adding verification procedures
fixed missing key and keyref in XSD
uncommenting kids, making schema location external

Signed-off-by: greenTara <taraathan@gmail.com>
adding edges for complete normal form

Signed-off-by: greenTara <taraathan@gmail.com>
separating out extra values of @per (effect and modal) as modules

Signed-off-by: greenTara <taraathan@gmail.com>
update README.txt in relaxng/dr

Signed-off-by: greenTara <taraathan@gmail.com>
add effectful example to test suite

Signed-off-by: greenTara <taraathan@gmail.com>
separating out @per values of "effect" and "modal" into modules

Signed-off-by: greenTara <taraathan@gmail.com>