Format testcase.xsl and testresult.xsl by `xmllint --format`

Reference: http://xmlsoft.org/xmllint.html
This just formats the .xsl files' indent with 2 spaces, empty line.
`tests.xml` looks the same as before.
Replace tab with 2 spaces for .xsl file indent
Format tests.xml and result.xml by `xmllint --format`

Reference: http://xmlsoft.org/xmllint.html
This just formats the .xml files' indent with 2 spaces, empty line.
`tests.xml` and `result.xml` look the same as before.

Expect the generated result.xml use 2 spaces indent.
Format test_definition.xsd by `xmllint --format`

Reference: http://xmlsoft.org/xmllint.html

This just formats the test_definition.xsd indent with 2 spaces,
and removes empty line.
No code logic change.
Format tests.css

- http://google-styleguide.googlecode.com/svn/trunk/htmlcssguide.xml
- Indent by 2 spaces at a time
- Separate selectors and declarations by new lines
Format application.js

- http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml
- Indent by 2 spaces at a time
- Remove trailing white spaces
Rename readme.txt to readme.md and format it

- Reword and format the text as markdown
- Remove trailing white spaces
Format README.md and remove a duplicated README
Merge pull request #47 from zqzhang/zqzhang/xsl-format

Format testcase.xsl and testresult.xsl by `xmllint --format`
Merge pull request #48 from zqzhang/zqzhang/xml-format

Format tests.xml and result.xml by `xmllint --format`
Merge pull request #49 from zqzhang/zqzhang/xsd-format

Format test_definition.xsd by `xmllint --format`
Merge pull request #50 from zqzhang/zqzhang/css-format

Format tests.css
Merge pull request #51 from zqzhang/zqzhang/js-format

Format application.js
Merge pull request #52 from zqzhang/zqzhang/md-format

Rename readme.txt to readme.md and format it
Merge pull request #53 from zqzhang/zqzhang/readme

Format README.md and remove a duplicated README
update test app obtaining
fix localhost device no issue: use empty
fix core test issue: return code for app user
update for web driver test: app name rules
update version to 3.1.7