New file organization as discussed in #619 + Jetpack Infinite scroll Jetpack suggested by @grappler
Merge branch 'theme-organization' of https://github.com/leopuleo/_s into theme-organization

# By Leonardo Giacone (3) and leopuleo (2)
# Via Leonardo Giacone
* 'theme-organization' of https://github.com/leopuleo/_s:
  Removed spaces in _s_jetpack_setup -> used Tabs
  Removed Spaces -> Tab
  Added comment to _s_infinite_scroll_render function
  Rename "templates" folder in "template-parts" as suggested in #619
  Added Jetpack support as suggested by @grappler