Increase timeout to install requirements
Set the pip timeout globally for Travis

Conflicts:
	.travis.yml
Fix bug in bicubic interpolation and extend test cases to higher orders
Add reference to bicubic interpolation
Make code PEP8 compliant
Fix reference syntax
Modified the order of API docs page so that table of contents is always
at the top (following #880)
Fix broken test case, which used black image
Fix bug in get_pixel3d
Fix quadratic interpolation
Use SciPy for second order interpolation, add warnings to buggy functions
Remove broken test case
Over and underline alignment
Removed seealso field that was not recognized in gallery example
Create a new figure for imshow if there is already data
Prevent travis-try breaks when recreating hard link for PyQt
Merge pull request #1285 from blink1073/fix-travis-setup

Prevent travis-retry breaks when recreating hard link for PyQt
Merge pull request #1281 from blink1073/fix-imshow

Create a new figure for imshow if necessary
Merge pull request #1273 from blink1073/increase-pip-timeout

Increase timeout to install requirements
Add python3 doc building capability