Fix RST formatting
bring back the explaination of our LGTM process

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
add a little info on upgrading

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
add a little more information about the docker run -P option

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #4054 from SvenDowideit/boot2docker-upgrade-doc

add a little info on upgrading b2d
Merge pull request #4057 from SvenDowideit/add-P-docs

add a little more information about the docker run -P option
Merge pull request #3988 from dafyddcrosby/fix_formatting

Fix RST formatting
Merge pull request #4050 from SvenDowideit/put-back-LGTM

bring back the explanation of our LGTM process