merged branch duo-criativa/master (PR #544)

Commits
-------

11b8689 Refactoring: using && instead of nested if's
7aa6757 Bug correction: Parsing integers large than PHP_INT_MAX was generating trucated token values.
046e4ff Bug correction: Parsing integers large than PHP_INT_MAX was generating trucated token values.

Discussion
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Fixed bug that was trucating integers large then PHP_INT_MAX

The following code

{% set sizes = [7077888, 452984832, 28991029248, 1855425871872, 9223372036854775807] %}
{% for i in sizes %}
   {{ i }}
{% endfor %}

was generating the following output

7077888
452984832
2147483647
2147483647
2147483647

With the fix, the output looks like the following on Ubuntu 11.04

7077888
452984832
28991029248
1855425871872
9.2233720368548E+18