v0.5.0 CRAN

• fix bug in mpf pagination (and thus export_as_txt) when column labels had newlines (#150, rtables#634)
• font_size is now 8 consistently across the pagination machinery.
• When specified, margins are in inches (including the default).
• Fix off-by-one error in pagination machinery for certain cases.
• Refined informative messages when pagination is verbose (verbose = TRUE).
• Referential footnotes with specified (non-number) symbols are now printed once per page regardless of the number of elements on the page they refer to.
• New export_as_txt function operates now on any object with an applicable matrix_form method (including pagination).
• New paginate_indices and paginate_to_mpfs functions.
• New diagnose_pagination function accepts the same arguments as paginate_to_mpfs and returns information about the pagination algorithm outcome at both row and column positions.
• MatrixPrintForm objects now pay closer attention to referential footnote information than they did in the past.
• MatrixPrintForm objects infer detailed referential footnote information from their strings element for backward compatibility.
• Fix to test that failed on old Windows CRAN machine due to imperfect UTF support there.
• If lpp and cpp in pagination or exporter functions are assigned to NULL, no pagination in the vertical or horizontal direction happens, respectively.
• The new default of NA_integer_ for lpp and cpp now means those values should be inferred from page size.
• Added hexSticker logo.

What's Changed

• Workflow updates by @walkowif in #128
• Update token name by @walkowif in #146
• paginate passing tests. a few doc issues outstanding by @gmbecker in #144
• fix mpf row subsetting when cols nlheader != nrheader (rtables 634) by @gmbecker in #152
• update news and bump version by @gmbecker in #153
• release 0.5.0 by @Melkiades in #151

Full Changelog: v0.4.1...v0.5.0