Added option to disable two way data binding

[przemyslaw-zan]

Suggested merge commit message (convention)

Feature: Added an optional option called disableTwoWayDataBinding that allows disabling the two-way data binding. It increases performance when working with large documents. Closes #141.

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Additional information

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[coveralls]

Pull Request Test Coverage Report for Build 577

• 13 of 13 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 570:	0.0%
Covered Lines:	158
Relevant Lines:	158

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💛 - Coveralls