Fix wrong chmod on mkbootimg
Merge pull request #4 from Dr-Shadow/master

Fix wrong chmod on mkbootimg
updated gitignore
code cleanup and revised verbose output
renamed scripts
- doesn't make sense to keep references to MT65xx anymore because
the scripts work not only with images from MT65xx SoC's, but also
with those from MT83xx (and most likely with future MT67xx)
boot or recovery is now extracted to the working directory
- fixes issue #6
unpack result is always stored on working directory
- this extends commit f2f2d0eb8ab7dae330558b69119078bc98e91912.
- up until then the unpack script could only be used in the same directory
  where boot, recovery or logo images were.
- now, the unpack result is always stored on the working directory, despite
  of the input file path