S3 method issues

[joshuaulrich]

Description

With R-devel (83995-ish) R CMD check and _R_CHECK_S3_METHODS_SHOW_POSSIBLE_ISSUES_=true shows the following:

Package quantmod:
Mismatches for apparent methods not registered:
str:
  function(object, ...)
str.replot:
  function(x, ...)

unique:
  function(x, incomparables, ...)
unique.formula.names:
  function(x)

range:
  function(..., na.rm)
range.bars:
  function(x, type, spacing, line.col, up.col, dn.col, up.border,
           dn.border)

Apparent methods for exported generics not registered:
  seriesHi.timeSeries seriesLo.timeSeries

Need to register S3 methods for

• str.replot()
• seriesHi.timeSeries()
• seriesLo.timeSeries()

And rename unexported functions unique.formula.names() and range.bars().