note using py.test -- specify 'tests' folder

On Solaris and OSX, when running a bare 'py.test', it locks up
indefinitely after line, 'collecting 0 items'. ^C also does
not respond, so I'm not able to discern exactly where the
lockup is -- regardless, if you specify the 'tests' folder,
it issues fine.
Merge branch 'issue-44-solaris-try-3' of github.com:pexpect/pexpect into issue-44-solaris-try-3