newsfragments directory not created #85
Description
When running towncrier --draft first time, it crashes with:
Loading template...
Finding news fragments...
Traceback (most recent call last):
…
File "/tmp/myvenv/lib/python2.7/site-packages/towncrier/_builder.py", line 46, in find_fragments
files = os.listdir(section_dir)
OSError: [Errno 2] No such file or directory: '…/PyInstaller/newsfragments'
towncrier should not crash with a traceback, but catch the exception and print a nice error message without traceback. Or it should create this directory.