adding comments
length window processor implementations
methods to support window implementation
method refactor
window query parser implementation
test cases for window implementation
removing validator exception
Merge branch 'Siddhi-3.0.0' of https://github.com/sacjaya/siddhi into Siddhi-3.0.0
improvemtents based on code review
addine extension support
add stream definition validation
merging scjaya/Siddhi-3.0.0
code formatting
making ValidateExecutionPlan() public
renaming varaibels of MetaStreamEvent
adding extension loader
Merge pull request #21 from sacjaya/Siddhi-3.0.0

Changes based on code review
Extension support
Length window implementation