cleaned up file names (fixes #173)

[jameslamb]

See #173

[codecov-io]

Codecov Report

Merging #174 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #174   +/-   ##
=======================================
  Coverage   90.51%   90.51%           
=======================================
  Files          10       10           
  Lines         938      938           
=======================================
  Hits          849      849           
  Misses         89       89

Impacted Files	Coverage Δ
R/SummaryReporter.R	100% <ø> (ø)
R/DependencyReporter.R	83.46% <ø> (ø)
R/FunctionReporter.R	93% <ø> (ø)
R/InheritanceReporter.R	100% <ø> (ø)

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[jayqi]

@jameslamb I just opened #181 which touches all of these files. Can we revisit this after #181 is merged?

[jayqi]

Let's please save this for after #181.