Revert "[Meera] Correct RBearing of vocalic RR"

This reverts commit 79fe562173cbf0e1c60918a0dc7fb15f09380333.
[Meera] Bring back half forms of consonants.
This is needed for correct rendering of ra-kar glyphs in Qt 4.x
Partially reverts b211969e6b1f168

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
[Meera] Bring back pres rules with half forms for ra-forms of consonants
Needed for correct rendering in Qt 4.x
This reverts commit e4b89f646e0e86c122546d9618ac88018583612e.

Conflicts:
	Meera/Meera.sfd