Introduce neocomplete
Add basic configuration for neocomplete:

* enable it,
* disable rebuild on load
* smartcasing
Add snippets and neosnippets
Remove ultisnips with neosnippets
Merge branch 'feature/neocomplete' into develop

* feature/neocomplete:
  Remove ultisnips with neosnippets
  Add snippets and neosnippets
  Add basic configuration for neocomplete:
  Introduce neocomplete