added builder->clear() method to clear out all tasks.
Merge pull request #12 from tamagokun/clear-phake

clear() method to clear out all existing nodes
Added some helper functions to show colored messages
Added some helper functions to show colored messages
Check env for a tty output and skip colors if in a pipe
Updated color codes to ANSI codes
Added more color helpers
Fix text output to a pipe with escaped quotes
Replaced write and added writeln function. Now write won't break the line
Tidy up;

  * renamed `bash_colors.php` to `term_colors.php`
  * TTY constant moved to phake::is_tty()
  * `color()` renamed to `colorize()`
  * colors array is static var inside `colorize()`
  * moved `write()` and `writeln()` to `global_helpers.php`
  * simplified write()/writeln(), removed `output()` - unsure of its purpose
  * `write()` no longer inserts a space after a newline
composer keywords
Merge branch 'master' of git://github.com/jaz303/phake

Conflicts:
	composer.json