[IATI/IATI-Websites#94] Updates -> upgrades
[IATI/IATI-Standard-SSOT#7] Add license
Merge branch 'wendy-branch'
Update 1-prepare-your-org.rst

Made some tweaks to use of capitals; added 'potential' wherever risks are mentioned;

Questions / Comments:
Line 10 - should we link aim to get a couple of case studies linked from here? One for the next iteration I think.
Line 20 - made some changes to the wording on security issues.
[IATI/IATI-Extra-Documentation#41] Add link to develepor docs
Update 1-prepare-your-org.rst
Merge branch 'joni-branch'

Conflicts:
	en/publishing-to-iati/how-to-publish/1-prepare-your-org.rst
Updates the information about how to contribute upgrade ideas.
Adds clarity about other forums as request
Fixes typo
Merge pull request #5 from IATI/upgrade-info

Updates the information about how to contribute upgrade ideas.
[#7] Update license

Add note about the license applying to text, not images
Add note about external codelsits
Updates For Review Comments

Most of the issues for https://github.com/IATI/IATI-Guidance/issues/4
resolved