Fix some typos in R package documentation
(cherry picked from commit 517df50)
Write branch information to a text file in h2o R package
(cherry picked from commit cdcc7b1)
Save R process ID to temp file to keep track if current R session started the H2O instance
(cherry picked from commit 4679977)
Remove all h2o.shutdown commands at the end of examples or demos
(cherry picked from commit d79b0c7)