Remove random zero-width non-breaking spaces (UTF-8 encoded BOMs).
Fix a typo, use an en dash.
Suggested by lint.
Use ellipsis character (…) instead of three dots.
Don’t say please.
Reworded other texts. Less wordy. Important bits firs.
All per  Android style guide. https://developer.android.com/design/style/writing.html
Put negative buttons to the left starting with API 14, the way they should https://developer.android.com/design/building-blocks/dialogs.html .
Also removed a bit of trailing white space and fixed a typo in javadocs.
Replaced Yes and No in dialog buttons with more precise term and Cancel.
Some more clean-up of texts. Removed bits of fluff like "successfully".
Use sp, not dp for text sizes.
Suggested by lint.
Use sentence case, contractions, following the Android writing style guide.
Dto. Use of periods. No for one sentence, one per sentence if more then one.
Also joined identical string constats.
Add description to the image buttons. Used by screen readers.
Set backup to on in manifest. Suggested by lint.
Fix in code: a layout parameter has changed its name from FILL_PARENT to MATCH_PARENT between API 7 and 8
Also clean bits that are possibly unused.
Ignore lint warning here. Those buttons look strange as buttonbar buttons.
Make dialogs buttons look more like in other apps, at least for API >=14 (where we start with Cancel on the left.) (They still have an extra border.)
Make using italic, light and oblique fonts work in Turkey.
Fixes for DefaultLocale lint warning.
Don't reuse a button. Lint comlained.
Made the sound Hadler static.
Probably not a big problem, but suggested by lint.
Make a few more strings translatable. Don’t complain that “1” is not.
Register the GraphicalActivity (statistics)
Remove an unused xml namespace.
Remove title from some dialogs that don't need one.
* Un-removed [zwnbs](http://www.fileformat.info/info/unicode/char/feff/index.htm) in translations (fixed at Crowdin instead), undid changes to XML-version of the tutorial.
* Use Html &hellip;, a few contractions it the  asset tutorial.
* Changed a number formating we came along from English to local.  (I checked other use of Locale, they seem to be OK.)
* Fixed a typo in a comment i wrote.
* Say "touch" (which is used in the Android docs), not "click" in the tutorial, refer to the ⊕ button to get shared decks, mention "learnig" cards.
* Also use "touch" rather then "click" or "tap" elsewhere. I hand wondered which one, tap or click, was the right one. According to the Android docks apparently none of those two.
* Say "buried" again in one text
* Added a few question marks to dialog questions.
* Shortened a button text
* Use "acknowledge" internally when we show that something has happend (XX done OK),  to distinguish from the concept of confirmation (Should we XX?).
Add .gitattributes to define .java, .xml and a few other files as text.
This causes line endings to go from CRLF to LF in some files in the repo. Should be handled the Right Way on check-out.