支持nodejs依赖解析，支持规则区间的比较

[40huo]

支持nodejs依赖解析，支持规则区间的比较
支持Java依赖中的变量

[coveralls]

Pull Request Test Coverage Report for Build 446

• 94 of 154 (61.04%) changed or added relevant lines in 2 files are covered.
• 21 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+0.3%) to 41.714%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cobra/cve.py	15	18	83.33%
cobra/dependencies.py	79	136	58.09%

Files with Coverage Reduction	New Missed Lines	%
cobra/init.py	1	29.11%
cobra/utils.py	1	35.34%
cobra/config.py	2	63.64%
cobra/dependencies.py	2	63.64%
cobra/log.py	3	44.93%
cobra/api.py	4	12.79%
cobra/cve.py	8	80.49%

Totals
Change from base Build 443:	0.3%
Covered Lines:	1684
Relevant Lines:	4037

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💛 - Coveralls