Merge pull request #17 from tsapeta/0.2.x

merge 0.2.x into 0.3.x
fixed eq & item methods by replacing if with while statement
improve delete function
rename the function name from active to current

+ replacing them in the other methods
changes in first/second/last methods
fixed getNext & getPrev
unifying code
reduce code
increased version to 0.3.0
Merge pull request #18 from tsapeta/0.3.x

merge 0.3.x (0.3.0)