Merge pull request #51 from amalloy/master

Typehints
Inc version.
Add new fn find-files*; redefine find-files in terms of find-files*

`find-files*` is like `find-files` but allows the use the use of a
predicate function to select files instead of a regular expression.
`find-files` has been redefined in terms of `find-files*`.

Add test for both functions.
Use filter instead of for
Merge pull request #53 from noprompt/master

Add new function find-files*
Remove contributors stuff since there is a gh page for that.
Inc version.
Update copyright
Fix invalid `fs/touch` return value

`fs/touch` should have been returning the file object but instead was
returning the `fs/file` function.
Documentation clean up.
Add `fs/hidden?` for testing if files are hidden
Closes #48: Add `fs/link?` for testing if a file is a symbolic link

Also added functions `fs/link`and `fs/sym-link` for creating hard and
soft links respectively.
Drop unnecessary do
Merge pull request #54 from noprompt/master

Fix touch, add hidden?, link?, link, and sym-link functions
Inc version.
Update version
... in both places.
Define fns that require Java 7 conditionally
Test fns that require Java 7 conditionally
Merge pull request #55 from noprompt/master

Define fns for Java 7 conditionally