Visual Selection Formatter

Now you can format visual selections.

Stdin Option Added, Goodbye to job_control

Added option for formatters to receive data via stdin.

Now using system() instead of job_control

shfmt & pandoc flavored markdown support

Added check to make sure buffer is modifiable

Check &modifiable before starting neoformat

Also added logging to cmd definition

Composite filetypes == Okay

added fix for composite filetypes

Now, instead of spitting an error message into (n)vim's messages,
the composite filetype is split and the first filetype is used.
e.g. `javascript.jsx` --> `javascript`

Neoformat, now with Vim support.

v0.1.0

update readme with vim compatibility

v0.0.1

added docs 🐋