deprecation process for a nice api design (as discussed in #124)
deprecation process for a nice api design (as discussed in #124)

deprecate:

- definition
- goto
- complete
- related_names
- function_definition

in favor of:

- goto_definitions
- goto_assignments
- completions
- usages
- call_signatures

Thank you @dbrgn and @tkf for the fruitful discussion!

tjwei/jedi,jonashaag/jedi,WoLpH/jedi,mfussenegger/jedi,dwillmer/jedi,jonashaag/jedi,flurischt/jedi,dwillmer/jedi,tjwei/jedi,flurischt/jedi,mfussenegger/jedi,WoLpH/jedi