bug #11 Declare dependency on ext/intl (dzuelke)

Declare dependency on ext/intl

[Icu] Fixed IcuTestCase to set a common locale for all tests

[Icu] Updated data files with improved transformation classes

[Icu] Upgraded data files to ICU 51.2

[Icu] Bumped Intl dependency to 2.3

[Icu] Bumped Intl dependency to 2.3-RC

[Icu] Added version check to make sure the 1.2.x tests are only executed on ICU >= 4.4

[Icu] Added integration test to verify that the binary resource files can be read

[Icu] Fixed failing test

[Icu] Bumped symfony/intl dependency

[Icu] Removed unnecessary version check from the base test case

[Icu] Created new branch 1.2.x bundling resource files in version 2.*

[Icu] Changed composer.json to actually require lib-ICU

[Icu] Changed IcuData::isLoadable() to IcuData::isStubbed and added IcuData::getBundleReader()