errorist 0.1.0

Feature

• When multiple warnings occur, each unique warning is searched separately
  instead of searching only the latest value. (#9,
  closing (#7))

Fixes

• Warning messages now have their locale specific prefix. (#9)

• Ensured the last.warning object was created by setting options('warn' = 0),
  which is the default value. Upon unload, the warning level is restored to
  the old value. (#8)

• Fixed a spurious URL in README/NEWS.md

Documentation

• Improved the package vignette by providing examples of how the handler pick
  up errors and warnings. (#10)