Presubmission miscellania

[richfitz]

• Spelling check
• Update licence year
• Bump version to 1.0.0
• Update repo status
• Confirm that things work without compilation
• Add pkgdown site to DESCRIPTION URL
• Add sections to the pkgdown reference (Break vignettes into sections on pkgdown site #331, see orderly)
• Add sections/ordering to the pkgdown articles
• Cross reference other articles from the main vignette
• Write blogpost
• Try with rhub::check(platform = 'ubuntu-rchk')
• Try with rhub::check_with_sanitizers()
• try with m1 mac, as this seems to throw up annoying issues
• dust.Rmd tweaks
  * cross reference data vignette in sir example
  * show NAMESPACE file in package example
• cuda.Rmd tweaks
  * "For example running 2^16 (6.5536 × 104) particles only takes a little longer" - numbers do not match, printed poorly
• withr becomes optional dependency (see Separate dependencies into interactive vs noninteractive #146)
• delete unused arrays/vectors examples
• see if we can drop a precompiled ex or two to drop the size of the package
• skip on cran rng tolerance tests (stochastic, platform dependent and I am in no mood for CRAN's sillyness)
• add references to papers throughout, for rng and particle filter sections
• check lto (see r-exts)
• skip_on_cran becomes skip_for_compilation in many places, along with better messages
• Standardise on dust vs dust in vignettes etc (code case or not)