Corrected some sentences which didn't flow well

Signed-off-by: Martin Evans <martindevans@gmail.com>
make a new post about a possible timetable for Heist

Signed-off-by: Martin Evans <martindevans@gmail.com>
enabled latent semantic indexing

Signed-off-by: Martin Evans <martindevans@gmail.com>
Added a post about how to release Heist

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