Adding patches and tmp to deploy excludes

[dpagini]

Not sure if all of these are appropriate, but wanted to open for discussion.

• Exclude /scripts directory
  • I believe these are all dev support scripts and would not be used in the artifact. I could be wrong here though?
• Exclude /patches directory
  • Patches get applied in $ composer install command, meaning the folder is a remnant of the source code.
• Exclude /tmp directory
  • Not sure where this get used, but have found it in my project a few times. It's .gitignore'd, so I can't imagine we would want it in our build artifact.

A few other thoughts...

• I don't know if there is a recommended place to put blt overrides (phing, etc.), but we have them in /blt/custom, so I exclude the /blt directory. If that is recommended in the docs as best practice, maybe that folder should be excluded (similar to excluding the /box directory.
• Should/could all README.md files be excluded from the build artifact? Probably not, but that's something I do.

[edit] realizing that /scripts is a remnant of pre-composer blt architecture.