[MRG] update README to include more install options (#423)

* Add conda install instructions
* update README, index to include more install foo

README.md

@@ -34,9 +34,12 @@ sourmash is a product of the
 
 ## Installation
 
-You can do:
+We currently recommend installing the 2.0 pre-release series directly
+from GitHub.
 
-    pip install sourmash
+You can use pip to do that like so:
+
+    pip install https://github.com/dib-lab/sourmash/archive/master.zip
 
 sourmash runs under both Python 2.7.x and Python 3.5.  The base
 requirements are screed and ijson, together with a C++ development
@@ -47,6 +50,18 @@ The comparison code (`sourmash compare`) uses numpy, and the plotting
 code uses matplotlib and scipy, but most of the code is usable without
 these.
 
+### Installation with conda
+
+You can also use conda:
+
+```bash
+$ conda create -n sourmash_env sourmash python=3.6.4
+$ source activate sourmash_env
+$ sourmash compute -h
+```
+
+which will install the latest alpha release.
+
 ## Support
 
 Please ask questions and files issues
@@ -63,8 +78,9 @@ Development happens on github at
 
 Tests require py.test and can be run with `make test`.
 
+Please see [the developer notes](doc/developer.md) for more information.
+
 ----
 
 CTB
-
-6.jun.2016
+Feb 2018

doc/index.rst

@@ -79,6 +79,14 @@ and experiment with it yourself `interactively with a binder
 <http://mybinder.org/repo/dib-lab/sourmash>`__ at `mybinder.org
 <http://mybinder.org>`__.
 
+Installing sourmash
+-------------------
+
+We currently suggest installing the latest pre-release in the sourmash
+2.0 series; please see [the README file in
+github.com/dib-lab/sourmash](https://github.com/dib-lab/sourmash/blob/master/README.md)
+for information.  You can use pip or conda equally well.
+
 Memory and speed
 ----------------