minor tweaks to README.md

Author: rsignell-usgs

README.md

@@ -3,27 +3,27 @@
 
 ##Subpackages:
 
-grid  -  Tools for dealing with curvilinear grids
--gridgen
--focus
--boundaryclick
--Grid
--gshhs
--greatcircle
-tools -  Generic tools.
--polygeom
--polyclick
--delaunay
-io
--pupynere
--Dataset
-ocean
--depths
--velocity
--time
-roms -  Tools specific to the Regional Ocean Modeling System
--nc_variables
--write_roms_grid
-getm - Tools specific to the General Estuarine Transport Model
--nc_variables
--write_getm_grid
+* grid  -  Tools for dealing with curvilinear grids
+  - gridgen
+  - focus
+  - boundaryclick
+  - Grid
+  - gshhs
+  - greatcircle
+* tools -  Generic tools.
+  - polygeom
+  - polyclick
+  - delaunay
+* io
+  - pupynere
+  - Dataset
+* ocean
+  - depths
+  - velocity
+  - time
+* roms -  Tools specific to the Regional Ocean Modeling System
+  - nc_variables
+  - write_roms_grid
+* getm - Tools specific to the General Estuarine Transport Model
+  - nc_variables
+  - write_getm_grid