fiftyone fails to import if not installed in a virtual environment
Due to at least https://github.com/voxel51/fiftyone/blob/v0.1.3/fiftyone/constants.py#L32
diff --git a/fiftyone/constants.py b/fiftyone/constants.py
index 8343f66e8..2d713634b 100644
--- a/fiftyone/constants.py
+++ b/fiftyone/constants.py
@@ -29,7 +29,6 @@ except ImportError:
 
 # Directories
 FIFTYONE_DIR = os.path.abspath(os.path.dirname(__file__))
-FIFTYONE_ENV = os.environ["VIRTUAL_ENV"]
 FIFTYONE_CONFIG_DIR = os.path.join(os.path.expanduser("~"), ".fiftyone")
 FIFTYONE_CONFIG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "config.json")
 BASE_DIR = os.path.dirname(FIFTYONE_DIR)
@@ -58,7 +57,6 @@ DB_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "var/lib/mongo")
 DB_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, "mongod")
 DB_CLIENT_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, "mongo")
 DB_LOG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "var/log/mongodb/mongo.log")
-os.environ["PATH"] = os.pathsep.join([FIFTYONE_CONFIG_DIR, os.environ["PATH"]])
 START_DB = [
     DB_BIN_PATH,
     "--dbpath",
['fiftyone/constants.py']