adding basic grep example
adding handler to app
changing searching to regex
renaming callback from all_done to log_result
fixing typo in README and moving grep import to top of __init__.py
changing import style in __init__.py
remove os.path import and add defaults decorator to build_and_start
added copyright notice to grep example
added docstrs and comments to the code.
added a few more comments
Merge branch 'master' into grep_example

Conflicts:
	example/__init__.py
fixed defaults import and moved log_results function
Merge pull request #27 from tannermiller-wf/grep_example

Grep example