pxmake 0.12.1

New features

• px() and px_save() can write and read to and from .parquet files.
• Change default value for all mandatory keywords to be descriptive rather than
  empty string "". This was done because PxWin does not allow empty strings in
  mandatory keywords. (#320)
• Improve implementation and fix bugs in px_cellnote() and px_cellnotex(). (#289)

Bug fixes and minor improvements

• Keyword UNITS is now placed after CONTVARIABLE and VALUES in the px file. (#308)
• Add default values for mandatory keywords in all languages. (#219)
• Bugfix px_language() stops removing previously defined languages. (#297)
• Change sorting order of px-file, so variables within keywords are in
  stub/heading order instead of alphabetic. (#264)
• Throw error if any value contains quotation marks ("). (#238)
• Allow minimal px object to be created even if no input is provided. (#234)
• Bugfix px_micro() used undefined function. (#290)
• Changing figures removes previous figures variable form cells1 and cells2. (#300)
• Add validation check that CONTVARIABLE and TIMEVAL has to be STUB or HEADING variables. (#305)
• Add pxmake logo.
• Keyword MAP is now stored in variables2 instead of table2. (#295)