Documentation fixes

[vincentvanhees]

• Fixes extEpochData_dateformat => extEpochData_timeformat #982
• Fixes Allow for user to set segmentDAYSPTcrit.part5 to be c(0, 0) #980
• Fixes various typos in GGIR.Rd as brought to my attention by Pieter-Jan Marent
• Removed very old argument window.summary.size from all documentation and code. It was only used in one specific study that GGIR no longer facilitates.

Checklist before merging:

• Existing tests still work (check by running the test suite, e.g. from RStudio).
• Added tests (if you added functionality) or fixed existing test (if you fixed a bug).
• Updated or expanded the documentation.
• Updated release notes in inst/NEWS.Rd with a user-readable summary. Please, include references to relevant issues or PR discussions.
• Added your name to the contributors lists in the DESCRIPTION file, if you think you made a significant contribution.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ededec3) 78.41% compared to head (b6df3fd) 78.46%.

❗ Current head b6df3fd differs from pull request most recent head a464699. Consider uploading reports for the commit a464699 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #988      +/-   ##
==========================================
+ Coverage   78.41%   78.46%   +0.04%     
==========================================
  Files          99       99              
  Lines       13371    13367       -4     
==========================================
+ Hits        10485    10488       +3     
+ Misses       2886     2879       -7     

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[jhmigueles]

Documentation reads well, I don't have further comments here. Thanks!