Merge pull request #38 from timelyportfolio/0.3

 update list.join example to work correctly
refine
refine docs for list.join
merge all comparer functions. closes #39.
refine
return non-logical search result (#40)

`list.search.fun` now accepts results with more than one element and not necessarily logical vector.
fix (#40
Merge branch '0.3'

Conflicts:
	R/internal.R
fix #41
add test for nested search
Merge pull request #42 from timelyportfolio/master

add test for nested search
fix #41
Merge branch '0.3' of https://github.com/renkun-ken/rlist into 0.3
update author
refine docs
fix test for nested list.search to handle blank names
revert email
Merge branch '0.3' of https://github.com/renkun-ken/rlist