RFR: Updated section on Code Conventions. [v4]

[Andreas Lundblad]

> Pull request for adding code conventions.
> 
> The code conventions in this pull request is a verbatim copy of [3]. These conventions were the ones discussed in
> detail on discuss at openjdk.java.net in 2015. Two rounds of reviews were performed, [1] [2], and all comments were
> addressed. The 6th and last draft [3] has been stable since then, and been in use by several OpenJDK projects.  [1]
> http://mail.openjdk.java.net/pipermail/discuss/2015-August/003766.html [2]
> http://mail.openjdk.java.net/pipermail/discuss/2015-August/003771.html [3]
> http://cr.openjdk.java.net/~alundblad/styleguide/index-v6.html

Andreas Lundblad has updated the pull request incrementally with two additional commits since the last revision:

 - Changed from 1. to #. in a few ordered lists.
 - Added an empty line to separate text from list.

-------------

Changes:
  - all: https://git.openjdk.java.net/guide/pull/14/files
  - new: https://git.openjdk.java.net/guide/pull/14/files/119ea0cf..d85c4742

Webrevs:
 - full: https://webrevs.openjdk.java.net/guide/14/webrev.03
 - incr: https://webrevs.openjdk.java.net/guide/14/webrev.02-03

  Stats: 19 lines in 1 file changed: 1 ins; 0 del; 18 mod
  Patch: https://git.openjdk.java.net/guide/pull/14.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/14/head:pull/14

PR: https://git.openjdk.java.net/guide/pull/14