fixed one-hang-bug in cocos-console-test.py
Removed external folder
Adds external submodule
Updates travis-script, removed using download-deps.py now, 'external' is
a submodule module now. please use `git submodule update --init` to
fetch it.
Re-adds resources in cpp-tests and lua-tests, but removes some large
files. We need to reuse some resources when doing some tests.
Xcode project fix
Removes download-deps.py, using `git submodule update --init` to get the
external libraries. Thanks.
Merge pull request #6571 from dumganhar/re-add-res

'external' folder is a submodule now, re-added resources for cpp-tests and lua-tests except large files
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #6572 from CocosRobot/update_cocosfiles_1399268435

[AUTO][ci skip]: updating cocos2dx_files.json
Adds submodule for CocoStudio resources (70MB)
Updates xcode project, add ccs-res folder to Resources folder
Merge pull request #6573 from dumganhar/v3

Adds submodule for CocoStudio resources (70+MB)
Update README.md, update branch for travis build status
removed obsolete headers
updated missing files
added missing Assets folder
added missing Assets folder
removed obsolete include files
Particles can be created without texture

Needed for complex particles like in EarthWarrior3D