Merge pull request #20 from serj-p/master

list of allowed contact search API fields updated
Update changelog.rst
Update conf.py
Update index.rst
Update tutorail with more information on redirect_uri patameter
Added information on fields presentations
Merge pull request #21 from serj-p/master

Described new search behaviour
Merge pull request #22 from serj-p/master

Fixes for broken formatting
Added examples and tools section

Added examples and tools section

Minor bugfixes
add users last contacted