pidgin/nest

Unify contents of contributing section into a single page

2021-07-04, Sorvival
74890bc9a66d
Unify contents of contributing section into a single page

- Add some basic content to the index of the development section so that
it's not empty
- Remove contributing/mercurial page since its contents are now in the docs
page for using mercurial or in the (now single) contributing page.
- Add section in contributing page that points to useful link on how to
contribute code.
- Minor cleanups in the pre-existing contributing page
- Fix broken link in about index page that appeared after moving the
contributing section into a single page.

Testing Done:
Ran dev-server.sh and verified contents of the website looked as intended

Bugs closed: NEST-33

Reviewed at https://reviews.imfreedom.org/r/789/
{
"year": 2007,
"participants": [
{
"project": "MonoLoader",
"student": "Eoin Coffey",
"mentor": "Gary Kramlich",
"status": "Merged"
},
{
"project": "MySpaceIM Protocol Plugin?",
"student": "Jeffrey Connelly",
"mentor": "Sean Egan",
"status": "Merged"
},
{
"project": "Remote Logging",
"student": "Michael Shkutkov",
"mentor": "Richard Laager",
"status": "Waiting 3.0.0; Needs Work"
},
{
"project": "Certificate Manager",
"student": "William Ehlhardt",
"mentor": "Ethan Blanton",
"status": "Merged"
},
{
"project": "Finch Improvements",
"student": "Eric Polino",
"mentor": "Sadrul Habib Chowdhury",
"status": "Unknown"
},
{
"project": "Virtual Classroom over Pidgin",
"student": "Prekshu Ajmera",
"mentor": "Richard Laager",
"status": "Unknown"
},
{
"project": "Stabilize and improve MSN support",
"student": "Carlos Silva",
"mentor": "Mark Doliner",
"status": "Unknown"
},
{
"project": "Telepathy",
"student": "Will Thompson",
"mentor": "​Robert McQueen",
"status": "Telepathy Haze"
}
]
}