The usual ceremony

.hgignore

@@ -2,5 +2,6 @@
 \.(?:aux|eventlog|h[ip]|log|[oa]|orig|prof|ps|swp)$
 ~$
 ^tests/benchmarks/Benchmark$
+^tests/Properties$
 syntax: glob
 .\#*

README.markdown

@@ -0,0 +1,32 @@
+# Vectro: efficient, dense, high-fanout immutable vectors
+
+This package provides the vectro module, a Haskell library for working
+with immutable vectors that provide an efficient mutation interface
+(no, really!).
+
+The vector type is represented internally as a tree with high fanout,
+so its depth is bounded and accesses are very cheap.  Updates are also
+cheap, as they only need to copy those parts of a tree whose structures
+need modifying.
+
+
+# Get involved!
+
+Please report bugs via the
+[bitbucket issue tracker](http://bitbucket.org/bos/vectro/issues).
+
+Master [Mercurial repository](http://bitbucket.org/bos/vectro):
+
+* `hg clone http://bitbucket.org/bos/vectro`
+
+There's also a [git mirror](http://github.com/bos/vectro):
+
+* `git clone git://github.com/bos/vectro.git`
+
+(You can create and contribute changes using either Mercurial or git.)
+
+
+# Authors
+
+This library is written and maintained by Bryan O'Sullivan,
+<bos@serpentine.com>.

vectro.cabal

@@ -12,6 +12,7 @@ category:       Data, Data Structures
 build-type:     Simple
 cabal-version:  >= 1.6
 extra-source-files:
+  README.markdown
   benchmarks/Benchmark.hs
 
 library