Add composer.json
Uppercase Arr class file names
Uppercase Bool class file name
Uppercase File class file name
Uppercase Num class file name
Uppercase Str class file name
Add .gitignore
Fix syntax in .gitignore for vendor directory
Update composer.json file

I added description, keyword, authors, psr-4, etc.
Move source files to src directory

Before, the class definition files were stored in the src/Jstewmc/PhpHelper
directory, because I thought that was PSR-0 compliant. However, with PSR-4
I can define the location of a namespace. No more crazy directory structure.
Now, the source files are in the src directory.
Add phpunit.xml
Fix syntax error in phpunit.xml
Rename and move Bool test

Following convention, the Bool test class should be named BoolTest.php (notice
the case and class-name match). So, I fixed the file name, and I moved it from
tests/Jstewmc/PhpHelpers to tests
Move Str class file

Before, the Str class was in the tests/Jstewmc/PhpHelpers directory. Now, its
in the tests directory.
Rename class tests/str to tests/StrTest
Fix autoload path in composer.json
Fix test suite directory path in phpunit.xml
Fix namespace issue in BoolTest
Remove StrTest for now

My unit tests for the Str class are kind of crap. I've removed it for now
Refactor and fix Bool

Added logic to test the validity of Bool::booltostr()'s arguments, fixed
a few variable name issues, and fixed a few comments.