corporaexplorer 0.8.6

Fix bug introduced when re2 was reintroduced (4eeb2f3), which caused app to crash when searching in custom columns/metadata

corporaexplorer 0.8.5

re2 regex engine again included, now using the ‘re2’ package. This significantly speeds up many search operations. Thank you, @girishji! See https://github.com/girishji/re2
Small UI fixes

Fixed bug where time selection slider widget in calendar view did not work (#25)

Fixed bugs and warning messages caused by changes in other packages (tibble and dplyr).
Fixed special case of warnings occurring when visualising documents with zero hits (2270046)
Changed the way colours are represented in document visualisation (63b3857)

Because ‘re2r’ will be removed/archived by the CRAN maintainers. See https://github.com/qinwf/re2r/issues/22.

Added columns_for_ui_checkboxes argument to prepare_data() in order to include sidebar checkboxes for convenient filtering by categorical variable/column (not necessarily factor type, but most helpful when limited number of values in the variable) in the explorer app (explore()).

Removed dependencies on packages forcats, shinycssloaders, and zoo.
Fixed reactive issue leading to plots rendering twice when size was different from previous plot (now one has to click button to update plot size).
Other minor bug fixes.
Internal changes related to extension packages.

run_corpus_explorer() is deprecated and replaced with explore().
- explore() works in the precise same way as run_corpus_explorer(), but is faster to type and makes a nice pair with the new explore0() function (see below).
- run_corpus_explorer() still works (as a thin wrapper to explore()), but yields a warning.
Removed normalise argument from prepare_data()
Added within_group_identifier and tile_length_range arguments in prepare_data() (leading to new order of arguments)

Added explore0(), a convenience function to directly explore a data frame or character vector without first creating a ‘corporaexplorerobject’ with prepare_data().

Included demo apps: Jane Austen’s novels and State of the Union addresses, with data from the janeaustenr and sotu packages, respectively. See run_janeausten_app() and run_sotu_app()

Added search_options argument to run_corpus_explorer(), and moved the arguments use_matrix, regex_engine, optional_info, allow_unreasonable_patterns there.
Added plot_options argument (with several possibilities to customise plot colours etc.) to run_corpus_explorer(), and moved the max_docs_in_wall_view setting there.

Greatly simplified deployment to Shiny Server and shinyapps.io etc. (#19). See article on the package website.
Improved app experience on small screens (avoiding cluttering of ui elements).
Updated LICENSE file with license for jQuery.scrollTo.
Plot minimum height set to 50.
Minor app CSS twitches.