Added title font size support for the Popup widget. Originally suggested by user engicri on the kivy forums
Merge pull request #1003 from Zen-CODE/Doc_English_Improvements_6

Updated the 'Kivy on Android' documentaion
doc: fix ref _android
doubletap: fix doubletap behavior (just because tshirtman want to follow the rule: 2 release in a row.)
Added version added info for Popup widget title font size change.
Merge pull request #1008 from Zen-CODE/Doc_English_Improvements_7

Doc corrections to "\guide\architecture.rst"
Corrections and improvements to '/guide2/basic.rst'
Merge pull request #1005 from josephlee021/master

Add font size support for the Popup widget title.
Merge pull request #1012 from Zen-CODE/Doc_English_Improvements_8

Updates to '/guide2/basic.rst'
Small corrections and improvements to 'guide2\config.rst'
Merge pull request #1013 from Zen-CODE/Doc_English_Improvements_9

Small corrections and improvements to 'guide2\config.rst'
Force Context.gc() when deallocating some gl resources. closes #1014
fix 3Drendering example glsl code.  was missing precision definition
Fix pep8 style issues in core.text.
Catch the decode exception when calling text.decode, instead of the encode exception.
Merge branch 'master' of https://github.com/kivy/kivy into fix_decode_exception
Small corrections and improvements to the docs, 'guide2/events.rst'.
Missing 'the'.
Merge pull request #1016 from Zen-CODE/Doc_English_Improvements_10

Small corrections and improvements to the docs, 'guide2/events.rst'.
Merge pull request #1015 from matham/fix_decode_exception

Fix decode exception catching to use the proper exception