Fix README to link to the new documentation files
Merge pull request #93 from lnussel/master

Master
Merge pull request #94 from ancorgs/fix_doc_in_readme

Fix README to link to the new documentation files
Added section Basic Concepts in GettingStarted

 * Jobs states and results.
 * The concept of needle.
 * Interactive mode.
Merge pull request #95 from ancorgs/doc_job_states

Added section Basic Concepts in GettingStarted
Added missing content to Contributing.asciidoc
Merge pull request #97 from ancorgs/finish_contributing_guide

Added missing content to Contributing.asciidoc
update installation guide