Use versioned SONAME for libmapcache.
Move instructions to the doc module.
Merge pull request #84 from sebastic/branch-1-2

Use versioned SONAME for libmapcache.
report failed WMS requests or cache->sets immediately
Fix image resampling bug when outside grid limits (#85)
1.2.1 release
restrict extracted tiles to grid limits when assembling
restrict tiles when completely outside of grid extent
Fix segfault on error'ed mbtiles connection
Merge branch 'branch-1-2'

Conflicts:
	CMakeLists.txt