Remove duplicate 'listview' link on uix index
Avoids the "Too many open files" error in case of a large number of input files.
Merge pull request #1841 from ykmm/atlas-toomanyfiles-fix

Avoids the "Too many open files" error in case of a large number of inpu...
Merge pull request #1840 from dustinfarris/doc-fixes

Remove duplicate 'listview' link in uix index
Log the version of python in use.
doc: revisions to sources/guide/lang.rst
Fixes #1847.
Return an empty string for missing summary lines. Can't compare None to strings in Py3k.
Merge pull request #1848 from valrus/master

Fixes #1847.
doc: fix doc generation + pep8
doc: Added scroll effect info to scrollview doc
Merge pull request #1849 from inclement/docfixes

doc: Added scroll effect info to scrollview doc
doc: Updated default behaviour in Settings doc
Merge pull request #1850 from matham/log-py

Log the version of python in use.
doc: added explanation for AsyncImage