Update soft_skills.rst

Added new "Learning and strategies for improvement" section.
Added general tips for improvement.
Added a number of resources for learning, getting help, etc.
Created golden rules section.
Update soft_skills.rst

Fixed line wrap.
Update soft_skills.rst

Fixed more first person declarative's.
Removed double spacing.
Added 2 books.
Merge pull request #63 from jmreicha/patch-1

Update soft_skills.rst