WIP : add support for parameter in query

[fzerorubigd]

need more test
fixes #15

[coveralls]

Pull Request Test Coverage Report for Build 63

• 118 of 118 (100.0%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.3%) to 97.359%

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Totals
Change from base Build 54:	2.3%
Covered Lines:	3392
Relevant Lines:	3484

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 55

• 72 of 132 (54.55%) changed or added relevant lines in 7 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-1.6%) to 93.38%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
driver.go	4	6	66.67%
filter.go	2	12	16.67%
context.go	26	74	35.14%

Files with Coverage Reduction	New Missed Lines	%
context.go	1	85.12%

Totals
Change from base Build 54:	-1.6%
Covered Lines:	3343
Relevant Lines:	3580

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💛 - Coveralls