Merge pull request #4 from k-hotta/master

a pull request at the end of the implementation of ASTParser
create classes to create a svn repository
create a new class to manage a svn repository and implement a part of functions to initialize a repository
create a class for target language
create a class to represent an exception that indicates the target repository has not been initialized
implement some functions to gain information from svn repositories
[MINOR_CHANGE] remove unused import statements
implement a function to parse runtime arguments and load specified option values for MethodAnalyzer
create the main class of MethodAnalyzer (but it needs more implementations)