Added support for secureTextEntry (passwords)

Added a secureTextEntry property. Enabling this property causes the
TextField to display the entered text as bullets.
Changed some property names to match conventions.

Changed m_pSecureTextEntry to m_bSecureTextEntry and renamed
getSecureTextEntry to isSecureTextEntry
compare using epsilon and absolute difference
Merge branch 'master' of https://github.com/MarcelBloemendaal/cocos2d-x into MarcelBloemendaal-master
Added CCB_MEMBERVARIABLEASSIGNER_GLUE_WEAK

We've found it useful to use CCB_MEMBERVARIABLEASSIGNER_GLUE_WEAK in
situations where we don't want CCObject derived pointers retained. It's
also useful if you want to assign a pointer dynamically cast to an
abstract base class such as CCLabelProtocol.
fixed #2068: Fixing a compilation error on win32 since "•" couldn't be recognized by vs compiler.
fixed #2068: Updating source format.
fixed #2068: Tab ~> 4 spaces.
Merge pull request #2403 from dumganhar/iss2068-cctextfield-secure

fixed #2068: Adding a secureTextEntry property. Enabling this property causes the TextField to display the entered text as bullets.
Update AUTHORS
Merge pull request #2402 from brawsome/master

fixed #2069: Adding new macro CCB_MEMBERVARIABLEASSIGNER_GLUE_WEAK to CCBMemberVariableAssigner.h
Update AUTHORS
fix a compiling error
Merge pull request #2404 from minggo/assetmanager

fix a compiling error
Merge pull request #2398 from lgb/float_comparison_issue

fixed #1935: Float comparison must not use "==" in the equal function of CCPoint and CCSize, we should compare float number by using epsilon and absolute difference.
Update AUTHORS
Removing unused file(uthash.h) in JSB projects.
Merge pull request #2405 from dumganhar/master

Removing unused file(uthash.h) in JSB projects.
Fixed GCC warning on narrowing conversion
Add the base sample code for ads