Buffered, on-demand reading of time series

[ckittl]

Closes #420

[codecov]

Codecov Report

Merging #421 (a355423) into dev (f922492) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #421      +/-   ##
============================================
- Coverage     78.92%   78.86%   -0.07%     
- Complexity     2106     2138      +32     
============================================
  Files           259      261       +2     
  Lines          8253     8357     +104     
  Branches        775      783       +8     
============================================
+ Hits           6514     6591      +77     
- Misses         1346     1363      +17     
- Partials        393      403      +10     

Impacted Files	Coverage Δ
...in/java/edu/ie3/datamodel/io/sink/CsvFileSink.java	73.21% <0.00%> (-2.57%)	⬇️
.../ie3/datamodel/io/connectors/CsvFileConnector.java	78.18% <0.00%> (-1.96%)	⬇️
...3/datamodel/io/source/csv/CsvTimeSeriesSource.java	95.91% <0.00%> (-0.17%)	⬇️
.../edu/ie3/datamodel/io/source/TimeSeriesSource.java	100.00% <0.00%> (ø)
...del/io/source/csv/CsvWindowedTimeSeriesSource.java	78.31% <0.00%> (ø)
...datamodel/io/naming/DefaultDirectoryHierarchy.java	93.96% <0.00%> (+0.86%)	⬆️
...u/ie3/datamodel/models/value/EnergyPriceValue.java	60.00% <0.00%> (+20.00%)	⬆️

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