[Vim-l] Merging tips - new Template:Duplicate and docs

[John Beckett]

I have reworked the Vim Tip Guidelines at
http://vim.wikia.com/wiki/Vim_Tips_Wiki:General_guidelines

Following suggestions from Ipkiss, there are sections on merging similar
tips, and an overview of useful templates.

The merging documentation covers the new Template:Duplicate which can be
used to quickly flag two or more tips so readers are alerted that the tips
cover essentially the same material. Duplicate tips are listed in
Category:Duplicate so we will eventually merge them.

John