phpgraphlib_pie > Fix for last value (0)

When the last value of the data array is 0, entire pie chart is filled with the last data because the an arc from (360 -> 360) is created.
This problem can be fixed by simply skipping the drawing of the arcs when a value of (0) is provided.
Merge pull request #6 from LupinWonse/patch-1

phpgraphlib_pie > Fix for last value (0)
Adding example graphs
Updating readme with mention of included examples
Updating readme with mention of included examples
PHP5 compatibility and syntax overhaul
Merge pull request #8 from elliottb/3.x-dev

PHP5 compatibility and syntax overhaul
Adding composer support
Merge pull request #9 from elliottb/3.x-dev

Adding composer support
Fix label centering for pie graphs

Fix an issue concerning how percentages were shown for pie graphs. They
weren't centered, but now they are.
Merge pull request #11 from studiosi/master

Fix label centering for pie graphs
Expanding example index page
Expanding example index page, styles
Merge pull request #12 from elliottb/3.x-dev

Merging in 3.x dev - expanded example index.html
added function $graph->setIgnoreErrors(true);

added function $graph->setIgnoreErrors(true); which will ignore errors and draw the graph anyway. Useful for debugging or when handling large number of data points
Merge pull request #1 from Hurtak/patch-1

added function $graph->setIgnoreErrors(true);
changed $x_axis_value_interval_counter to -1

changed $x_axis_value_interval_counter from 0 to -1, it gives much better numbers

Before change ($x_axis_value_interval_counter = 0): 

$graph->setXValuesInterval(99); 
    output: 99, 199, 299...
$graph->setXValuesInterval(100); 
    output: 100, 201, 202...

After change ($x_axis_value_interval_counter = 1): 

$graph->setXValuesInterval(99); 
    output: 100, 200, 300...
renamed ignore_errors to ignore_data_fit_errors
currency symbols repaired
Update phpgraphlib.php

currency symbols repaired