charts 6.x-1.0

This release correct several small-but-critical bugs, removes both FusionCharts and OpenFlashCharts (they will be included again in the future) and views integration.

Note: i would like to have extra maintainers to help on this. Im specially interested in implementing the Interactive Charts from Google and increase the number of features for all of the supported charts.

New features:
* Google Charts now have stacked bars (vertical and horizontal)
* Users might choose to display value labels and series legends
* Amazing GD Image library chart creator by Mads Peter Henderson

Improvements:
* The default chart settings' page slightly reorganized: multiple charts printed at once, some fieldsets and the new Label and Legend options
* Chart example generator now requires both type and title
* Both FusionCharts and OpenFlashCharts removed. Because they never worked correctly, its far better to add them later, with better implementations
* Remove the spedific views option Show Legend since its now possble to select it normally
* Google Charts now use the label/legend switch accordingly
* #716546 by tracerul: adding "alt" attribute in the img tag for Google Charts make some HTML validators calm down
* #261437: Documentation about Flash filef by brmassa
* A warning on hook_requirements when the PHP version is below 5.2

Bugs Fixed:
* Google pie charts now use the correct color scheme
* #666630 (comment 2) when the label list is full of NULLs, consider it blank
* #755682 since Drupal does not require PHP 5.2 or newer, Charts module should not either
* _charts_series_values() shuold be only in charts.inc
* #518872 after almost 1.5 year without programming for Drupal, fixed this bug on dev. sorry everybody
* #470826: Changes to get FusionChartFree v3 work by brmassa and Panthrax
* #473292: PHP errors on Charts settings page by Surrogard

Internals:
* According to http://code.google.com/apis/chart/docs/making_charts.html, Google Charts API have a method to speed up browser requests. However, this features does not seem to work properly. The code is comment for further investigation
* Some tips and code standarts pointed by Code Review module implemented
* Committing the same patches as the HEAD version