Added new Doxygen style function documentation for C and assembly language

[dpitic]

Extended C snippets with Doxygen style function documentation triggered using /**. This could be used for any high-level programming function documentation, e.g. Java, etc. Maybe there is a better place to put this new documentation snippet to make it accessible to other languages also?

Added new assembly language Doxygen style function documentation triggered using ;;.

Both snippets use JavaDoc style @ command format. This is compliant with Doxygen:
https://www.stack.nl/~dimitri/doxygen/manual/commands.html#cmd_intro

[Shougo]

Merged.

[dpitic]

@Shougo I don't have a ~/.SpaceVim/snippets/ directory as described in the SpaceVim documentation. Where are the default snippets located?

I want to remove my custom snippets from ~/.SpaceVim.d/snippets/ after the merge has been released. When will I know this merge has been released?

[Shougo]

I don't know SpaceVim behavior.
You should ask it to @wsdjeg in SpaceVim gitter room.

[wsdjeg]

how did you create custom snippet? maybe just use the command provided by neosnippet will help.

[dpitic]

@wsdjeg I used the :NeoSnippetEdit command which created my ~/.SpaceVim.d/snippets/ directory, as described in the SpaceVim documentation, which is my personal custom global snippets location. However, the SpaceVim documentation here: https://spacevim.org/layers/autocomplete/#snippets-directories, states that there should be ~/.SpaceVim/snippets/ which contains the SpaceVim runtime snippets; I don't have this directory. So what is the correct SpaceVim runtime snippets directory? Everything works because I have access to the snippets that are shipped with SpaceVim, but I just can't find where they are located.

[wsdjeg]

The spacevim doc seems wrong, I will update it, and we should use gitter room of spacevim for this question.