Rachana,Meera: More fixes to <Va,Virama,Va>, <Ya,Virama,Ya> cases

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Use 'psts' rule instead of 'akhn' for ligatures involving ു, ൂ, ൃ

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Use 'psts' instead of 'akhn' for <dotreph,ch3,u1>

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: 'akhn' to 'psts' correction for ൎതൃ, ൎത്തൃ

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: 'akhn' to 'psts' correction for ൎന്നു, and add ൎന്നൂ

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Add glyph ൎദ and change 'akhn' to 'pres' for ൎദ്ര

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>