Added NetCDFMonitor alias functionality.

[nick-weber]

• Made NetCDFMonitor accept a dictionary of aliases to rename the cached state variables.
• Added get_component_aliases() to utils.py
  • creates a dictionary of aliases for prognostic, diagnostic, and tendency variables

[codecov-io]

Codecov Report

Merging #22 into master will increase coverage by 0.87%. The diff coverage is 100%.

@@           Coverage Diff            @@
##           master    #22      +/-   ##
========================================
+ Coverage   75.13%    76%   +0.87%     
========================================
  Files          15     15              
  Lines        1283   1313      +30     
========================================
+ Hits          964    998      +34     
+ Misses        319    315       -4

Impacted Files	Coverage Δ
sympl/__init__.py	100% <ø> (ø)	:arrow_up:
sympl/_components/netcdf.py	88.7% <100%> (+1.43%)	:arrow_up:
sympl/_core/util.py	92.83% <100%> (+0.28%)	:arrow_up:
sympl/_core/wrappers.py	90.84% <100%> (+2.81%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 3f5d848...4e67f18. Read the comment docs.