Add python-dateutil dependency

Add --prefix install options

Update Heroku.rb

Add syncthing package

Add .github templates

Update less to include posix regex support

Update guile to include libtool as a runtime dependency

Update vim from 8.0-1 to 8.0.586

Add pre-built binaries for guile and urlwatch

Add guile package

Add diffutils dependency

Add urlwatch package

Remove --user install to ~/.local

Add filecmd dependency

Update nvm.rb

Binaries are broken like Nodebrew, better to just remove for now.

Add pre-built binaries for libusbmuxd and tig

Update libusbmuxd.rb

Update nodebrew.rb

Removing the binaries because they are corrupt and do not install correctly. 

```
 chronos@localhost ~/Downloads/Development/ama-website/public_html_ama $ nodebrew install stable 
Fetching: https://nodejs.org/dist/v9.2.0/node-v9.2.0.tar.gz
Warning: Failed to create the file 
Warning: /home/chronos/user/.nodebrew/src/v9.2.0/node-v9.2.0.tar.gz: No such 
Warning: file or directory

curl: (23) Failed writing body (0 != 940)
download failed: https://nodejs.org/dist/v9.2.0/node-v9.2.0.tar.gz
```

`crew install nodebrew -s` works.

Update tig package to compile correctly

Add needs_binaries.sh and needs_binaries.sh scripts

Add pre-built binaries for c-z packages

Add pre-built binaries for a-n packages

Add tldr package.

Fix for #1458. Correct sha256sum added.

Tldr is a collection of simplified and community-driven man pages.

Update nginx from 1.13.6-2 to 1.13.7