call -m: Fixed Watterson estimator
call -m: Estimate AF from PL instead of QS (experimental)
Recognise both FMT and FORMAT strings
norm: Bugfix, check for mismatches in ref/alt prefix
index: Minor change of error message
norm: Changed left-alignemnt to be always parsimonious
call -m: Don't choke on "." PL fields, treat everything other than diploid as missing
Merge branch 'develop' into QS-vs-PL
htscmd => bcftools in log output
Merge pull request #52 from mcshane/feature/isec_minor_fix

isec minor fix
call -m: Estimate AF from PL instead of QS, version 2 (experimental)
mcall -m: Added documentation to estimate_qsum
filter: Support for FORMAT/GT and FORMAT vectors
Merge branch 'develop' into QS-vs-PL
stats: Prevent segfault of FS stats when -s not given
gtcheck: No warning for absent PLs with -G
merge: New --force-samples option
view: Prevent use of unitialized ac[0]
filter: Fixed string matching in FMT and INFO
filter: Fixes in string comparisons, updated docs