remove build-common as submodule. This commit will not compile.
Squashed 'build-common/' content from commit 667edee

git-subtree-dir: build-common
git-subtree-split: 667edee87f3dc5d44ac2c131c414379bf2880d22
Merge commit '2aeebf19530aeef7fb63b0f65307fa2f35ed2155' as 'build-common'
update install information and FAQ
abstract out reference loading.
quickie fix for https://www.biostars.org/p/98497. Attempt to load the reference for every pileup up position. Untested.
patch samtools to handle situation where LB tags aren't in the @RG header line
warn the user if they requested per-lib counts, but the library isn't available. Those reads without a library will not be counted in per-lib mode.
add test around having missing LB tags
Merge remote-tracking branch: upstream/master