Create CLDR datetime/parse and its unit tests

- Implement datetime/tokenizer;
- Update datetime format to consider default as a literal;
- Skip literal pattern on datetime;
Build using requirejs and uglify
util/always_array to use util/array/is_array as Array condition
Create datetime/expand_pattern unit tests
Create datetime/parse functional tests
Add "reverse test" on datetime/parse functional tests. Fixes #189
Update metadata information by adding maintainers
Globalize.locale to return the current locale if no argument is provided
Update README content

- Update headline, CLDR, Globalize.load(), Globalize.locale(), and
  Globalize.parseDate() content;