Track all the required changes for autogenerated files

**Feature description**

After generating some files it required to make some changes, improve/fix.

**Is your feature request related to a problem? Please describe.**
The generator is not perfect, if you want to customize or fix some this, this changes could be lose after a regeneration.

**Describe the solution you'd like**
A check list in the README to track the required changes after regenerating files.

**Additional context**
This is an example of a required change:
- https://github.com/skycoin/libskycoin/issues/66

**Possible implementation**
A new section in README and reference it from the "release instructions" section.

Relevant changes so far now:
=========================

- [Build curl lib in release mode](https://github.com/skycoin/libskycoin/pull/67)
- [Add `object.c` to the build.](https://github.com/skycoin/libskycoin/commit/15e4de5c9c87fb3e1a47059b9055440f636cc93a)