Incremental code push support

[jjuanmendoza]

@hnestmann @tobiaslohr
feel free to mark it as duplicate but this is what -to my view- we've concluded (After #20 discussion):
2 types of support

• file detail level
  using a kind of deploymentinfo.json file as parameter (created from SCM info as a preprocess before calling sfcc-ci) that keeps track of every single file (vs last deployed code version) added/removeed/changed
• cartridge level
  pushing the whole list (as parameter) of cartridges you wanna completely overwrite (no diff, just replace every cartridge in the list of the last deployed code version)
• (there could be a folder level too)
  working as cartridge level one but only for listed cartridge (even using wildcards) +folder/subfolder (i.e. static folders)

Thanks

[jjuanmendoza]

b61bd25
thanks @jbachelet