Add description of supported source formats

README.md

@@ -24,7 +24,7 @@ Please open a github issue here:
   https://github.com/quicklisp/quicklisp-projects/issues
 
 In the issue, please provide a brief description of what your project
-is for and where to fetch its sources.
+is for and where to fetch its sources in one of the [supported source formats](#supported-sources).
 
 Your project should include some form of README describing the project
 and its purpose.
@@ -37,3 +37,79 @@ Personal pet peeve: Please don't describe your project simply by
 saying it's an interface to some C library. Explain what the C library
 is for and why someone might want to use it from Common Lisp, and link
 to any useful information about the C library.
+
+## Supported Sources
+
+Quicklisp is able to pull code from several kinds of sources. Please see an examples of each provided below.
+
+### branched-git
+
+Points to a specific branch in a Git repo.
+
+*Example:* `branched-git https://gitlab.common-lisp.net/antik/antik.git master`
+
+### darcs
+
+*Example:* `darcs http://dwim.hu/live/hu.dwim.perec/`
+
+### ediware-http
+
+Historical source pointing to software by prolific lisper Edi Weitz. Points to projects hosted in the GitHub profile <https://github.com/edicl/>.
+
+*Example:* `ediware-http chunga`
+
+### http/https/single-file
+
+Points to a single file available at a URL.
+
+This file is expected to be in one of the formats, with accompanying file extension:
+
+* .lisp - Uncompressed single-file lisp source
+* .lsp - Uncompressed single-file lisp source
+* .tar - Uncompressed tarball
+* .tar.gz - Compressed tarball
+* .tgz - Compressed tarball
+* .zip - ZIP archive
+
+*Example:* `https https://common-lisp.net/project/adw-charting/adw-charting.tar.gz`
+*Example:* `single-file http://www.tfeb.org/programs/lisp/memoize.lisp`
+
+### kmr-git
+
+Points to a git repo hosted on <http://git.kpe.io/>.
+
+*Example:* `kmr-git cl-base64`
+
+### latest-github-release
+
+Points to the latest available release on a GitHub project.
+
+*Example:* `latest-github-release https://github.com/Lisp-Stat/array-operations.git`
+
+### latest-github-tag
+
+Points to the latest available tag on a GitHub project.
+
+*Example:* `latest-github-tag https://github.com/sheepduke/chameleon.git`
+
+### latest-gitlab-release
+
+Points to the latest available release in a GitLab repo.
+
+*Example* `latest-gitlab-release https://gitlab.com/daewok/adopt-subcommands.git`
+
+### mercurial 
+
+*Example:* `mercurial https://hg.stevelosh.com/adopt`
+
+### git
+
+*Example:* `git https://gitlab.common-lisp.net/alexandria/alexandria.git`
+
+### svn
+
+*Example:* `svn https://svn.common-lisp.net/cl-monad-macros/trunk`
+
+### tagged-git
+
+*Example:* `tagged-git https://github.com/borodust/bodge-blobs-support.git stable`