fix NullPointerException in SSAConverter
Fix JS divide operator
Fix conflict
bug fixed in SSACGenerator
update SSAConverter
SSAConverter support if-statement without else statement)
add command line option '-p'
Merge pull request #30 from sekiguchi-nagisa/master

bug fix  at UniqueName
Merge pull request #29 from tetsurom/master

Fix JS Generator
Merge pull request #28 from imasahiro/FixSSA

Update SSAConverter
Merge pull request #31 from nikuuchi/command_line_option

add command line option '-p'