Remove unhelpful examples
Merge pull request #26 from takluyver/examples-cleanup-1

Remove unhelpful examples
Added a control arguments to pxssh login method
- key verification for localhost
- configurable quiet setting
- synchronization multiplier for (very) slow connections

Added new method (try_read_prompt) to pxssh for performing the prompt read
quickly on fast connections while not failing on slower connections
Cleaned up prompt synchronization
__init__.py (pexpect)
- updated the read_nonblocking method to take a new boolean coerce_result
  argument

pxssh.py
- updated try_read_prompt to support python 2.x/3.x results from os.read
  (string/binary respectively)
Removed coerce_result argument from pexpect read_nonblocking method.
Removed call to self._coerce_read_string in try_read_prompt
This was an artifact from my attempt at adding support for non ASCII
character encodings in a prior commit.
Switched to a simpler approache for appending to the prompt
in try_read_prompt thanks to a suggestion from takluyver
Cleanup of unused import and loop exit strategy in try_read_prompt
Merge branch 'master' of github.com:joeledwards/pexpect

Conflicts:
	pexpect/pxssh.py