Feature: Option for BULK MODE SCAN from NATIVE APPLICATION is added

Feature: 
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Option for BULK MODE SCAN from NATIVE APPLICATION is added. Check ZXing Test application for sample use. See button "Bulk Scan Anything".

Minor Note:
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Many files have very simple changes due to removal of java 1.7 features like <>, switch on string etc. It is because i am using eclipse and by default Android doesn't support java 1.6

Signed-off-by: mharisce <m.haris.ce@gmail.com>