issue #35 #30 #27 #26 #23
Merge branch 'master' of https://github.com/gammapy/enrico
Merge branch 'master' of https://github.com/gammapy/enrico
Merge pull request #43 from cdeil/download_spacecraft_separately

Add option to download spacecraft file separately
issue # 44  # 42 #
Merge branch 'master' of https://github.com/gammapy/enrico
Use absolute imports everywhere as recommended by PEP8