delete useless codes
update StreamList._view consistently
fix a typo
add __str__ for class MutableView
update NAXX cards info
support to save parsed cards info into a file
Merge pull request #4 from chinesedfan/issue4

update NAXX cards info
Merge pull request #5 from chinesedfan/issue5

support to save parsed cards info into a file
Merge pull request #3 from chinesedfan/issue3

updates of class StreamList