Update 2013-11-12-I-Just-Needed-A-ReST.md

Line 28 added "is" in "However the whole steam lobby dependency is well abstracted" (done)
Line 46, last sentence hard to understand (not changed).
Line 65, split two long sentences into five (done).
Line 101, closing bracket moved from "generated)" to "worlds)" (done).
Line 101 "and" added after "worlds)"
Line 108 Split long sentence after "iteration over this" (done).
Fixed a long and complex sentence

Signed-off-by: Martin Evans <martindevans@gmail.com>
Added a post about the upcoming public release of heist

Signed-off-by: Martin Evans <martindevans@gmail.com>