Remove old Markdown templates and replace with new YAML templates.
Improve wording slightly, add links.
Signed-off-by: Ekaterina Gerasimova <ekaterinag@element.io>
Remove the old style Markdown templates and replace with new style yaml
templates. New templates match those used in element-web.
Note that issue labels will been to be renamed to match element-web
before this PR can be merged.
Signed-off-by: Ekaterina Gerasimova <ekaterinag@element.io>