convert hypens to minus signs and add example for creating JSON to manpage
check for a error on file open with -F option
fix documentation for creating JSON
ignore the built binaries.
Fix build on windows
Merge pull request #24 from jmetzmeier/master

Manpage and segfault fix
Merge pull request #30 from jonhiggs/master

ignore the built binaries.
Merge pull request #31 from mattn/win32

Fix build on windows
remove empty input warning (no *nix tools do this)
Add -E flag to generate empty object from empty input
Add description of new -E flag to manpage