New features

• New function clusterpci() for CI and test for a single binomial proportion
  from clustered data.
• Example datasets are now included.
• Improved documentation with pkgdown website & vignettes.

In pairbinci():

• skew for skewness correction.
• bcf for variance bias correction.
• Default paired RD and RR method changed to new SCAS method
  (i.e. including skewness correction - manuscript under review).
• method_RD, method_RR and method_OR are replaced with method.
• Bonett-Price methods for RD and RR (including proposed Jeffreys variant
  option for RR).
• TDAS method is deprecated.
• Default for MOVER method changed to Jeffreys.
• MOVER calculations now use x/N as point estimate instead of median from the
  Beta distribution.
• cc uses a new form of correction for RR giving equivariant intervals. Also
  allows consistency with the continuity-corrected McNemar test (or an
  intermediate correction of the user's choosing). cctype is deprecated.
• Default conditional odds ratio method changed to SCASp (with closed-form
  calculation).
• Output object now includes estimates of p1, p2, phi (correlation)
  and psi (odds ratio used by Fagerland et al).
• Output object now includes function call.

In scaspci():

• bcf option now implemented for contrast = "p" (default = FALSE).
• bign allows a different sample size to be used in the bias correction
  (used within transformed SCASp method for paired OR in pairbinci, for
  consistency with 'N-1' test).

In scoreci():

• bcf option now implemented for contrast = "p" (default = FALSE).
• (Note adjusted sample size for bias correction can be achieved by including a
  non-zero value for n2.)
• ORbias, RRtang, and MNtol arguments renamed as or_bias, rr_tang and mn_tol.
• Implementation of precis argument is improved for RR and OR contrasts.
• For contrast = "RD", weighting = "Tang" provides optimal test if RR is
  constant across strata.

Bug fixes

In exactci():

• Corrected duplicate point estimate reported for vector inputs.
• Derive point estimates to match LCL and UCL with level = 0.
• Corrected LCL for Poisson mid-p method.

Other

• Output object column names are updated (lower, est, upper) for consistency
  and style conformity.
• Tests added to confirm consistency of score methods vs McNemar test.
• Dependence on polynom package removed.
• Edition 3 of testthat implemented.