Remove wrench and temp and favour using archive.bulk method

[thom4parisot]

There are regular bugs (#57 #17) about temporary files not being deleted.

Plus I do not like the idea we generate temporary files during crx.load and copy them again into a zip archive.

Here is the proposed plan:

• crx.load() should load only the manifest
• a new method should:
  1. locate the files in the folder containing the manifest.json
  2. filter out the ones which do not comply to exclude rules and list them for audit/inspection purposes
  3. return a map of src/dest to include in the extension
• pass the src/dest list to archiver.bulk during crx.pack()
• archiver.glob contains all the necessary selection and exclusion logic

Many advantages:

1. we reduce the number of dependencies
2. we benefit of an exclude system which can back Set ignore file to .crxignore like .gitignore #49 and/or Implement .crxignore #51 and mostly src pattern DOES NOT ignore elements grunt-crx#44
3. everything is achievable with archiver directly
4. the user is in control of what is written on disk