mcm compressor: context mixing + lzp

Fast + effective CM algorithm

- LZP for faster compression of highly compressible files

- Binary + text detection for model switching

- E8E9 filter for X86 binaries

Benchmarks:

Sandy Bridge 2630QM, 8GB RAM, Windows 7 x64, GCC compile (make.bat)

- Silesia corpus (separate files) from http://mattmahoney.net/dc/silesia.html:

Program	Compression size	Compression time
Uncompressed	211,938,580	N/A
7z ultra 1 thread	48,745,801	140s
CCM 7	44,954,217	70s
CCMX 7	43,970,142	86s
mcm v0.82 -turbo -9	42,837,008	81s
mcm v0.82 -fast -9	41,819,611	91s
mcm v0.82 -mid -9	40,541,614	116s
mcm v0.82 -high -9	40,242,195	132s
mcm v0.82 -max -9	40,068,926	140s

- ENWIK8 from http://mattmahoney.net/dc/text.html:

Program	Compression size	Compression time	Decompression time
Uncompressed	100,000,000	N/A	N/A
CCM 7	21,980,533	35s	Unmeasured
CCMX 7	20,857,925	46s	Unmeasured
mcm v0.82 -turbo -9	20,429,116	48s	Unmeasured
mcm v0.83 -t9	20,199,979	40s	34s
mcm v0.82 -fast -9	19,958,144	51s	Unmeasured
zcm 0.92 -m7 -t1	19,803,554	45s	Unmeasured
mcm v0.82 -mid -9	19,520,204	60s	Unmeasured
mcm v0.82 -high -9	19,318,179	73s	Unmeasured
mcm v0.83 -f9	19,313,858	43s	36s
mcm v0.82 -max -9	19,211,781	80s	Unmeasured
mcm v0.83 -m9	18,627,061	49s	44s
mcm v0.83 -h9	18,504,139	58s	54s
mcm v0.83 -x9	18,379,121	64s	59s