title: pypi erro when try to install gcsfs in google composer(airflow)
body: <p>I use google composer-1.0.0-airflow-1.9.0. I used dask in one of my DAG and wanted to setup composer to use dask. One of the required package for this DAG is gcsfs. When I tried to install it via Web UI I got the below error:</p>
  
  <p>Composer Backend timed out. Currently running tasks are [stage: CP_COMPOSER_AGENT_RUNNING description: "Composer Agent Running. Latest Agent Stage: stage: DEPLOYMENTS_UPDATED\n ." response_timestamp { seconds: 1540331648 nanos: 860000000 } ].</p>
  
  <p>Updated: </p>
  
  <p>The error is coming from this line of code when dask tries to read file from gcp bucket:dd.read_csv(bucket) 
  log:</p>
  
  <pre><code>     [2018-10-24 22:25:12,729] {base_task_runner.py:98} INFO - Subtask:   File "/usr/local/lib/python2.7/site-packages/dask/bytes/core.py", line 350, in get_fs_token_paths
       [2018-10-24 22:25:12,733] {base_task_runner.py:98} INFO - Subtask:     fs, fs_token = get_fs(protocol, options)
       [2018-10-24 22:25:12,735] {base_task_runner.py:98} INFO - Subtask:   File "/usr/local/lib/python2.7/site-packages/dask/bytes/core.py", line 473, in get_fs
       [2018-10-24 22:25:12,740] {base_task_runner.py:98} INFO - Subtask:     "Need to install `gcsfs` library for Google Cloud Storage support\n"
       [2018-10-24 22:25:12,741] {base_task_runner.py:98} INFO - Subtask:   File "/usr/local/lib/python2.7/site-packages/dask/utils.py", line 94, in import_required
       [2018-10-24 22:25:12,748] {base_task_runner.py:98} INFO - Subtask:     raise RuntimeError(error_msg)
       [2018-10-24 22:25:12,751] {base_task_runner.py:98} INFO - Subtask: RuntimeError: Need to install `gcsfs` library for Google Cloud Storage support
       [2018-10-24 22:25:12,756] {base_task_runner.py:98} INFO - Subtask:     conda install gcsfs -c conda-forge
       [2018-10-24 22:25:12,758] {base_task_runner.py:98} INFO - Subtask:     or
       [2018-10-24 22:25:12,762] {base_task_runner.py:98} INFO - Subtask:     pip install gcsfs
  </code></pre>
  
  <p>When tried to install gcsfs in google composer UI using pypi got below error:</p>
  
  <pre><code> {
     insertId:  "17ks763f726w1i"  
     logName:  "projects/xxxxxxxxx/logs/airflow-worker"  
     receiveTimestamp:  "2018-10-25T15:42:24.935880717Z"  
     resource: {…}  
     severity:  "ERROR"  
      textPayload:  "Traceback (most recent call last):
      File "/usr/local/bin/gcsfuse", line 7, in &lt;module&gt;
      from gcsfs.cli.gcsfuse import main
      File "/usr/local/lib/python2.7/site- 
       packages/gcsfs/cli/gcsfuse.py", line 3, in &lt;module&gt;
         fuse import FUSE
       ImportError: No module named fuse
      "  
     timestamp:  "2018-10-25T15:41:53Z"  
      }
  </code></pre>