added all_line_numbers()
replacing lines in original file and printing modified file
changed default config file to use .importanizerc
adding new line at the end of file
added .importancerc config file
using context manager in read()
added --print option
is default for now however should be flipped for 0.1
not adding extra 2 lines after imports if there is no more content in the file
ran importanize on the project itself