Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Remove config option
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Remove config option
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Remove config option
Move sed command out of the if block (no doc use flag anymore).
Update to EAPI 5 + gtk-doc changes

Bump to EAPI 5
Remove doc USE flag
Update to EAPI 5 + gtk-doc changes + mate punt la files

Bump to EAPI 5
Remove doc USE flag
Add MATE_LA_PUNT="yes" so we can remove custom LA_PUNT
 in src_intall.