Update composer, travis, phpunit

Minor clean-ups and optimizations.
 - `sauce_connect: true` was causing time-outs on `Travis` - I disabled it because the other web-tests are as well.
 - `Composer` autoloading is warmed-up with classmaps and include path hinting.
 - `PHPUnit` now logs code coverage with a hook for `coveralls.io` - **truth in advertising**

```
$ php vendor/bin/phpunit -c testFramework/unittests/phpunit.xml
PHPUnit 4.0.20 by Sebastian Bergmann.
Configuration read from /home/travis/build/texdc/ZenCart/testFramework/unittests/phpunit.xml
.....................
Time: 18.8 seconds, Memory: 21.00Mb
OK (21 tests, 133 assertions)
Generating code coverage report in Clover XML format ... done
Code Coverage Report:       
  2014-05-25 09:36:05       
                            
 Summary:                   
  Classes: 40.00% (2/5)     
  Methods: 55.10% (27/49)   
  Lines:   14.13% (537/3801)
@classes::base
  Methods:  22.22% ( 2/ 9)   Lines:   9.59% (  7/ 73)
@classes::zcPassword
  Methods:  55.56% ( 5/ 9)   Lines:  59.70% ( 40/ 67)
@classes::zcRequest
  Methods:  63.33% (19/30)   Lines:  92.60% (363/392)
someSanitizerClass
  Methods: 100.00% ( 1/ 1)   Lines: 100.00% (  2/  2)
```