Merge branch 'dev/0.2a0'

Author: Malcolm White

README.md

@@ -1,7 +1,7 @@
 # Welcome to the *pykonal* repository!
 This code implements a mixed- (first- and second-) order finite-difference solver for the 3D Eikonal equation in Cartesian and spherical coordinates using the Fast-Marching Method of Sethian et al. (1996).  
 
-If you make use of this code in published work, please consider citing White et al. (2019).
+If you make use of this code in published work, please cite White et al. (2019).
 
 ## Installation
 ```bash
@@ -24,6 +24,8 @@ sh$> pip install .
 
 
 ## References
-Sethian, J. A. (1996). A fast marching level set method for monotonically advancing fronts. *Proceedings of the National Academy of Sciences, 93*(4), 1591–1595. https://doi.org/10.1073/pnas.93.4.1591  
-
-White, M. C. A., Fang, H., Nakata, N., & Ben-Zion, Y. (2019). PyKonal: A Python package for solving the Eikonal equation in spherical and Cartesian coordinates using the Fast Marching Method. *Seismological Research Letters, in review*.
+<span style="font-family:Times">
+Sethian, J. A. (1996). A fast marching level set method for monotonically advancing fronts. *Proceedings of the National Academy of Sciences, 93*(4), 1591–1595. https://doi.org/10.1073/pnas.93.4.1591  </span>   
+<span style="font-family:Times">
+White, M. C. A., Fang, H., Nakata, N., & Ben-Zion, Y. (2019). PyKonal: A Python package for solving the Eikonal equation in spherical and Cartesian coordinates using the Fast Marching Method. *Seismological Research Letters*, in review.
+</span>