Fix spelling error
Added link to Testing wiki

After google "testthat" leads to the testthat package, this answers the question "where can I learn more"? Perhaps similar links from other package Readme files?
Merge pull request #67 from dlebauer/patch-1

Added link to Testing wiki from testthat/Readme.md
Merge pull request #37 from kenahoo/2fde0b7f84e816fb2cfa40ef00aac25b923b4595

Fix small spelling error in example
Version bump
Re-roxygenise
Use full param names
Trim trailing spaces
Don't rely on existing R error message.
Fixes #57
Update news
Tweak test failure language.
Closes #36
Add fail(). Closes #47
Update to evaluate 0.4.3.
Fixes #50
Work around r bug in make_expectation.
Fixes #52
Strip attributes when testing TRUE and FALSE.
Fixes #49
test watcher
fix watcher buglet
update NEWS