#40 - add support for source & region in the code XML element

[Doraku]

Impressive work, I'll try to take the time to review it properly. The fact that you had to upgrade to net5 seems strange but at the same times I was wondering if there was even a point in keeping net framework compatibility (and even netcore3.1) since most users would have net5 installed anyway. Losing all but net5 would probably enable an easy way to pack DefaultDocumentation as a global dotnet tool for those who wants it too. You even added tests, now I just feel ashamed for never coding any ^^"

[basvanderlaken]

Thanks, good to hear you appreciate it! Indeed net4* and netcore3.1 framework compatibility is quickly becoming less and less of an issue. Especially when building & running in containers. If it is ok with you, I will probably open some other issues & pull request for the following additional functionality:

• use \<see href/> iso cref to link to an external link as noted here
• use \<seealso href/> iso cref to link to an external as noted here
• add support for alternate links names when using see & seealso through either the XML element content value or the alt attribute
• add support for list
• and if I have a several rainy Sundays in a row, maybe conceptual documentation

[Doraku]

Just a quick note, I will do a quick refactoring to remove the multi targets to expose DefaultDocumentation both as a msbuild task and a dotnet tool so things will move around (most of the code will ends up in a DefaultDocumentation.Common lib). Hopefully I will be done with it this week end. Thanks again for this feature :)