pil is now available

install.sh
- corrected so now pil is used instead of pillow
psdtools/main.py
- uncommented lines to generate the pictures in png format
parser.py
- file is now checked with its magical number instead of its name containing "pdf" or "psd"
- check if file_exist
- check during the open/read process of the magic number

Signed-off-by: Mickael <mickael@beingenious.com>
modified readme

read me has been modified according to the previous push (magic number checking in parser.py)

Signed-off-by: Mickael <mickael@beingenious.com>
install.sh changed

using pip instead of easy_install to install pil

Signed-off-by: Mickael <mickael@beingenious.com>
removed easy_install from the installation procedure

pip is used instead of easy_install, updated install.sh so it's not installing it anymore, as well as readme to remove it from the install chapter

Signed-off-by: Mickael <mickael@beingenious.com>