Fixes a mesh with wedge cells

[bishtgautam]

• Fixes the computation of subface area for wedge cell
• Updates prefix of existing command-line options
• Adds a command-line option to specify an initial condition file and modifies an existing test to use the new command-line option

[bishtgautam]

This PR will be rebased after #168 is merged.

[codecov-commenter]

Codecov Report

Merging #169 (c34a290) into master (b20883c) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #169   +/-   ##
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  Coverage   67.73%   67.73%           
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  Files           7        7           
  Lines        1221     1221           
=======================================
  Hits          827      827           
  Misses        394      394           

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[jeff-cohere]

@bishtgautam, just confirming: this PR is ready to go, right? No longer a WIP?

[bishtgautam]

I'm working on adding a test for wedge mesh.

[bishtgautam]

@jeff-cohere There is already a test for wedge mesh. So, this is ready to be integrated.