Reorganize repo

- Env files are in binder directory
- notebooks are in the root directory

Close #2

README.md

@@ -10,15 +10,15 @@ Example repository to create an environment with course materials in Bash.
 
 ## Structure of the repo
 
-This repository follows the [binder-examples/conda](https://github.com/binder-examples/conda) example very closely.
+This repository is based on the [binder-examples/conda](https://github.com/binder-examples/conda) example.
 
 [`repo2docker`](https://repo2docker.readthedocs.io) is the underlying tool that is used to build an environment from a repository.
 
 `repo2docker` can be configured with several types of files. In the case of this repo:
 
-- `environment.yml`: specify dependencies that will be installed using `conda`
-- `apt.txt`: specify dependencies that will be installed using `apt`
-- `postBuild`: specify extra dependencies such as JupyterLab extensions and activate the [Bash kernel](https://github.com/takluyver/bash_kernel)
+- `binder/environment.yml`: specify dependencies that will be installed using `conda`
+- `binder/apt.txt`: specify dependencies that will be installed using `apt`
+- `binder/postBuild`: specify extra dependencies such as JupyterLab extensions and activate the [Bash kernel](https://github.com/takluyver/bash_kernel)
 
 Once created, the environment can be reused without building it again.
 
@@ -31,4 +31,4 @@ Materials can be added anywhere to this repository, either at the top level or i
 
 When building the environment, the materials (and any other file) will be copied to the Docker image.
 
-In this example, there is already a test notebook available under `materials/example.ipynb`.
+In this example, there is a test notebook available `example.ipynb`.