Can not boot into OSX after boot camp installation and resizing of Macintosh HD

Question

So from the beginning what I was trying to do was set up my iMac (27-inch, Late 2013)  with boot camp so that I could play some old windows based games that can not be played in Parallels.
I went through the Boot camp process and everything set up just fine.
I had both OS X Yosemite 10.10.2 and Windows 8 Professional running but as I was installing games on to boot camp I discovered I did not allocate enough space and needed to extend the Boot Camp partition.
I used boot camp utility to set OS X as the default start up disk and had it restart
I launched into OS X and used Disk Utility to shrink Macintosh HD another 120GB
Restarted again holding option and launched into Windows
Used the disk management in windows to try and extend the boot camp partition into the unallocated space.
It was not an option to extend it so I tried to create a new simple volume from the unallocated space then delete it and try to extend it again.
It still was not an option.
From there I went to restart again while holding option and the only options I had were 10.10 Recovery and Windows
I tried using disk utility in recovery and Macintosh hd now only showed disk0s2
I tried to verify and it could not verify
I tried to repair and it could not repair.
I put the iMac in target disk mode and using a thunderbolt cable I tried using disk utility from my MacBook Pro (13-inch Mid 2012)
Verifying volume “disk2s2”Verifying file system.** /dev/rdisk2s2
Invalid BS_jmpBoot in boot block: 000000
File system check exit code is 8.Error: This disk needs to be repaired. Click Repair Disk.
Verify and Repair volume “disk2s2”Repairing file system.** /dev/rdisk2s2
Invalid BS_jmpBoot in boot block: 000000
File system check exit code is 8.Updating boot support partitions for the volume as required.Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
This is the same error I got on my iMac
I used terminal diskutil list and got:
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:       Microsoft Basic Data                         799.3 GB   disk2s2
   3:                  Apple_HFS Recovery HD             650.0 MB   disk2s3
   4:       Microsoft Basic Data BOOTCAMP                70.3 GB    disk2s4
I can see that Macintosh HD was disk2s2 but it now shows its Microsoft Basic Data.
I did not format this partition and it was working fine till I restarted the computer after resizing Macintosh HD.
I am not sure what I can do to fix this.
I've found multiple articles about similar issues, but the issue thet they have was that they could not boot to Windows instead of my issue not booting to OS X

Answer 1

****************    Update    *****************
From the Windows Partition using Disk Management I can see that the drive is still labeled Macintosh HD and that all of my data is there.
I have a complete backup so i'm not worried so much about the data.
What I'm most interested in is trying to solve this issue because I'd like to continue using boot camp and I actually work with mac computers and would like to be able to help others if this issue arrises again.