Add MaoEtal12 and ReagEtal16 for multiscale-narrative-timeseries paper

[jeremymanning]

Summary

• Added 2 new bibliography entries for the multiscale-narrative-timeseries paper
• Added EPJ to caps.txt for proper capitalization

New References

• MaoEtal12: Mao, D., Hughes, J. M., Rockmore, D. N., Wang, Y., & Wu, Q. (2012). Empirical mode decomposition analysis for visual stylometry. IEEE Transactions on Pattern Analysis and Machine Intelligence, 34(11), 2147-2157.
• ReagEtal16: Reagan, A. J., Mitchell, L., Kiley, D., Danforth, C. M., & Dodds, P. S. (2016). The emotional arcs of stories are dominated by six basic shapes. EPJ Data Science, 5(1), 31.

Verification

• bibcheck.py verify passes with no errors