added world timezone definitions package to requirements.txt
Merge pull request #523 from kotnik/req-fix

added world timezone definitions package to requirements.txt
workaround for site theme navbar hiding targets
Merge branch 'master' of github.com:ralsina/nikola
avoid silly page titles
avoid post-dupes in indexes
New HIDE_SOURCELINK option
Fix #525
flake8
Fix #526
preparing 5.5
Initial mincss support (Issue #364)
Update of the IPython notebook plugin to support the upcoming 1.0 version of IPython.
Fix README.
Fix README again.
Fixing two issues with index page indices.

Issue 1: if Nikola indexes overflow from one page to two pages (i.e. `num_pages = 2`), `nextlink`
value is not set.

Issue 2: if Nikola is on the the `i == num_pages - 1` index page, it will not populate `prevlink`.
Since `prevlink` would be the `index.html` page, it needs it's own logic branch.
Merge pull request #535 from arusahni/master

Fixing two issues with index page indices.
Update
Fix #537
chart support