Add small-cap R
Modify av-ligature
Add some medieval glyphs and anchor points
Add ligature with thorn
Add and modify modifier characters

ringbelow modified
Add "con" and "usmod"
Add punctuations
Add space characters
Add symbols
Add "is" and "um"
Add "et", "etfin" and "apostrophemod"
Add and modify ligatures
Merge branch 'medieval'

Some addition and modification