Small change in naming
Fixed bug in LastModified and improvement in error handling
Added Google APIs
Created new Parameter
Improvement in parsing option
Merge remote-tracking branch 'origin/master' into issue65
removed Junit test for abstract class
made small changes to AlertTest.java and MarkTest.java
added testcases for CommandType, Complete, and Description
add testcases for Keyword, Location and Option
added testcases for TaskID, TaskType, Time, Title
added files ParameterListTest and RecurrenceTest
updated testcase for testRecurrence
added testcase for ParameterList