* Add Hentai2Read (hentai2read.com) source.
* Convert sch_flt_in and sch_flt_out to camelCase.
* Combine tag selectors in mangaDetailsParse().
* Move Pattern.compile() call to companion object to avoid repeated initialization.
* Move constant String imageBaseUrl to companion object.
* Make parseChapterDate() a little more compact.
* Refactor things to avoid unnecessary string splitting and calls to Elements.first().
* Remove implicit return and implicit return type from popularMangaRequest() and latestUpdatesRequest().
* Trim whitespace from string before parsing chapter date.
* Update POST params and change how tags are included/excluded.
* Add CharacterName and CharacterNameSelect filters.
* Add TagSearchMode filter.
* Change TagList to have title, to prepare for different groups of tags.
* Change TagList in FilterList to use new title.
* Add category list.
* Change tag list.
* Add doujin list.
* Update FilterList to include new filters.
* Add Gson and Kotson dependencies.
* Fix searching, now compute base64-encoded string to use in URL.
* Remove all code used to manually compute base64 string in URL.
* Add searchMangaParse override, store base64String if there is a next page in search.
* Remove unnecessary url val, left over from debug.
* Update tag list.
* Update doujin list.
* Update comments showing number of tags/doujins in TagList.
* Remove unnecessary tags var in mangaDetailsParse, can build manga.genre directly from list.
ddmgy