add some tests for data sources
moved 'output_file' in in file examples to match server examples.
merge master
update user guide charts documentations
add images used by user guide/ charts
fix typos
add new tests for Chart and ChartObject
Merge branch 'master' into task/examples
add Area chart tests
fix as suggested on first code review
add ipython interactor example with numba
add some interact examples
fix text
remove unfinished test
merge master
Merge branch 'task/add_new_chats_tests' into task/more_tests
remove comments
fix broken test for py3
Merge pull request #1502 from bokeh/task/1473_charts_documentation

Update documentation for 0.7 release
Merge pull request #1465 from bokeh/task/examples

Task/examples