Update README for v0.3.0 release.
Update README for v0.3.0 release.

[#99729802]

Signed-off-by: Stephen Levine <72d5489bdb659bea8b15ba0173fe796f11329883@pivotal.io>

Klaudit/lattice,SrinivasChilveri/lattice,datachand/lattice,svrc-pivotal/lattice,svrc-pivotal/lattice,cloudfoundry-incubator/ltc,davidwadden/lattice-release,Klaudit/lattice,felipeg48/lattice,SrinivasChilveri/lattice,davidwadden/lattice-release,datachand/lattice,svrc-pivotal/lattice,Klaudit/lattice,datachand/lattice,Klaudit/lattice,SrinivasChilveri/lattice,SrinivasChilveri/lattice,svrc-pivotal/lattice,cloudfoundry-incubator/ltc,datachand/lattice,davidwadden/lattice,felipeg48/lattice,davidwadden/lattice