I'm still stuck with it... I'm now running the internet recovery mode. Here I was able to access a terminal, so I tried some diskutil commands without success.
You can check the log in the following link: http://pastebin.com/2GNcxCDB
My system is at disk1
disk1s1 is the mac os partition
disk1s2 is the windows partition
Looks like the OS X partition has lost his properties... Anyone?
You can not create/resize/delete partitions using Disk Utility on a drive containing a Boot Camp partition. Since you did this you will have to erase and format your hard drive. Then reinstall OSx and start again with Boot Camp Assistant. The only way you can resize a Boot Camp partition is with CampTune or start over. You have to start over since you used the wrong tool.
What you can do is:
1. Startup your mac while pressing Command + S. It should come up with a black screen.
2. Once the text stops generating, type in "exit". (without "")
3. It should start properly.
If that doesn't work, check out this page: