Create 'data' directory before downloading databases

.travis.yml

@@ -4,6 +4,7 @@ python:
 install:
   - pip install -r requirements.txt
   - pip install -r test-requirements.txt
+  - mkdir data
   - wget https://www.dropbox.com/s/mz3afgncx0siijc/commits.json.xz?dl=0 -O data/commits.json.xz
   - wget https://www.dropbox.com/s/xm6wzac9jl81irz/bugs.json.xz?dl=0 -O data/bugs.json.xz
 script:

README.md

@@ -7,8 +7,9 @@ The dataset currently contains 2110 bugs, the accuracy of the current classifier
 ## Setup
 
 1. Run `pip install -r requirements.txt` and `pip install -r test-requirements.txt`
-2. Run `wget https://www.dropbox.com/s/mz3afgncx0siijc/commits.json.xz?dl=0 -O data/commits.json.xz`
-3. Run `wget https://www.dropbox.com/s/xm6wzac9jl81irz/bugs.json.xz?dl=0 -O data/bugs.json.xz`
+2. Run `mkdir data`.
+3. Run `wget https://www.dropbox.com/s/mz3afgncx0siijc/commits.json.xz?dl=0 -O data/commits.json.xz`
+4. Run `wget https://www.dropbox.com/s/xm6wzac9jl81irz/bugs.json.xz?dl=0 -O data/bugs.json.xz`
 
 If you update the bugs database, run `xz -v9 -k data/bugs.json`.
 If you update the commits database, run `xz -v9 -k data/commits.json`.