new ggplot and matlab examples
prerecognizing endotheliomas
Added try-excepts around url-ports and check for url before imaging.
protect against mismatched users.json files.
Added blanket, try-except around url-port to help publish complete.
ggplot -> ggplot2
Merge branch 'reorganization' of https://github.com/plotly/documentation into reorganization

Conflicts:
	auto-docs/chart-types/box/matlab-basic-box-plot/matlab/code.txt
	auto-docs/executables/matlab/matlab_basic_box_plot.m
	exceptions/matlab/matlab_basic_area.json
	exceptions/matlab/matlab_basic_bar.json
	exceptions/matlab/matlab_basic_box_plot.json
	exceptions/matlab/matlab_basic_box_plot.m
	exceptions/matlab/matlab_basic_fft.json
	exceptions/matlab/matlab_basic_heatmap.json
	exceptions/matlab/matlab_basic_histogram.json
	exceptions/matlab/matlab_basic_line.json
	exceptions/matlab/matlab_basic_stft.json
	exceptions/matlab/matlab_bubble_chart.json
	exceptions/matlab/matlab_contour_subplots.json
	exceptions/matlab/matlab_graph_plot.json
	exceptions/matlab/matlab_grouped_bar.json
	exceptions/matlab/matlab_horizontal_histogram.json
	exceptions/matlab/matlab_legend_inside.json
	exceptions/matlab/matlab_legend_outside.json
	exceptions/matlab/matlab_line_markers.json
	exceptions/matlab/matlab_line_style.json
	exceptions/matlab/matlab_meshgrid_contour.json
	exceptions/matlab/matlab_overlaid_bar.json
	pre-book.json