Add installation instructions through conda-forge

README.md

@@ -174,18 +174,33 @@ to distribute as a plugin, see the [subcommand API docs](https://docs.allennlp.o
 ## Installation
 
 AllenNLP requires Python 3.6.1 or later and [PyTorch](https://pytorch.org/).
-It's recommended that you install the PyTorch ecosystem **before** installing AllenNLP by following the instructions on [pytorch.org](https://pytorch.org/).
 
-The preferred way to install AllenNLP is via `pip`. Just run `pip install allennlp`.
+We support AllenNLP on Mac and Linux environments. We presently do not support Windows but are open to contributions.
 
-> ⚠️ If you're using Python 3.7 or greater, you should ensure that you don't have the PyPI version of `dataclasses` installed after running the above command, as this could cause issues on certain platforms. You can quickly check this by running `pip freeze | grep dataclasses`. If you see something like `dataclasses=0.6` in the output, then just run `pip uninstall -y dataclasses`.
+### Installing via conda-forge
 
-If you need pointers on setting up an appropriate Python environment or would like to install AllenNLP using a different method, see below.
+The simplest way to install AllenNLP is using conda:
 
-We support AllenNLP on Mac and Linux environments. We presently do not support Windows but are open to contributions.
+```
+conda install -c conda-forge python=3.8 allennlp
+```
+
+All plugins mentioned above are similarly installable, e.g.
+
+```
+conda install -c conda-forge allennlp-models allennlp-semparse allennlp-server allennlp-optuna
+```
 
 ### Installing via pip
 
+It's recommended that you install the PyTorch ecosystem **before** installing AllenNLP by following the instructions on [pytorch.org](https://pytorch.org/).
+
+After that, just run `pip install allennlp`.
+
+> ⚠️ If you're using Python 3.7 or greater, you should ensure that you don't have the PyPI version of `dataclasses` installed after running the above command, as this could cause issues on certain platforms. You can quickly check this by running `pip freeze | grep dataclasses`. If you see something like `dataclasses=0.6` in the output, then just run `pip uninstall -y dataclasses`.
+
+If you need pointers on setting up an appropriate Python environment or would like to install AllenNLP using a different method, see below.
+
 #### Setting up a virtual environment
 
 [Conda](https://conda.io/) can be used set up a virtual environment with the
@@ -197,13 +212,13 @@ environment you want to use, you can skip to the 'installing via pip' section.
 2.  Create a Conda environment with Python 3.7 (3.6 or 3.8 would work as well):
 
     ```
-    conda create -n allennlp python=3.7
+    conda create -n allennlp_env python=3.7
     ```
 
 3.  Activate the Conda environment. You will need to activate the Conda environment in each terminal in which you want to use AllenNLP:
 
     ```
-    conda activate allennlp
+    conda activate allennlp_env
     ```
 
 #### Installing the library and dependencies