Demo class matching filestore to partition

[dbwiddis]

Fixes #975

[coveralls]

Coverage remained the same at 88.098% when pulling 72a63fc on dbwiddis:demo into 75df799 on oshi:master.

[codecov]

Codecov Report

Merging #1290 into master will increase coverage by 0.42%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1290      +/-   ##
============================================
+ Coverage     84.59%   85.01%   +0.42%     
- Complexity      287      288       +1     
============================================
  Files            25       25              
  Lines           941      941              
  Branches        134      134              
============================================
+ Hits            796      800       +4     
+ Misses           83       80       -3     
+ Partials         62       61       -1     

Impacted Files	Coverage Δ	Complexity Δ
oshi-core/src/main/java/oshi/util/ParseUtil.java	93.27% <0.00%> (+0.30%)	123.00% <0.00%> (+1.00%)
oshi-core/src/main/java/oshi/SystemInfo.java	44.44% <0.00%> (+8.33%)	7.00% <0.00%> (ø%)

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