Use stdbool in os module
Added clint check for TRUE/FALSE
Implement job control

- Add a job control module for spawning and controlling co-processes
- Add three vimscript functions for interfacing with the module
- Use dedicated header files for typedefs/structs in event/job modules
Add BACKERS.md

List of Neovim backers provided by Bountysource
Format backers list
vim-patch:7.4.181

Problem:    When using 'pastetoggle' the status lines are not updated. (Samuel
            Ferencik, Jan Christoph Ebersbach)
Solution:   Update the status lines. (Nobuhiro Takasaki)

https://code.google.com/p/vim/source/detail?r=cb5683bcde03796baa7e845fd9a2fcaec3383538
Move functions from os/fs.c into path.c

Move unit tests from os/fs.moon to path.moon
Move and adapt `os_get_absolute_path` unit tests to `vim_FullName`

* Add two new unit tests to `vim_FullName`
* Make `os_get_absolute_path` static
Change prefix from `os_*` to `path_*`
Move exe functions back to os/fs.c