Code to checkpoint cu_info and lcu_t
Use an assert instead of a dumb assignment
Checkpoint on frame checksum
Ignore kdevelop files, kvazaar executable and log files
Fix bug in CHECKPOINTS_FINALIZE() when checkpoints are disabled
Checkpoint in pixels_blit, and avoid doing undefined behaviour when source and destination is the same.

Seems a reasonnable point to observe when refactoring, since it's called on most image data.
sao_info checkpoints
Fix uninitialized sao_info structure members, which was creating false positive when checkpointing SAO
Add checkpoint in sao_reconstruct
Replace copy of images made for tiles by sub-images (no copy)

- replace width by stride where required in the source code
No-copy works with --no-sao --no-deblock
No-copy works with --no-sao (deblocking enabled)
No-copy works (SAO and deblocking enabled)
Remove unneeded encoder_state_blit_pixels
Tentative fix for deadlock
Tentative fix for race condition
Add missing headers to VS project.
Merge branch 't-20140612'