Merge pull request #207 from joergi-w/hiwi

expand gt encseq info, create gt encseq sample
remove implicit mapping to first sequence

Accepts the use of '-encseq', '-seqfile' and '-seqfile'
without '-matchdesc' or '-usedesc' only when MD5 tagged
annotations are used.
add gt_strand_invert()
fix strand output in ORF finder
ensure return to silence compiler warnings
Merge pull request #210 from satta/regionmap-options

remove implicit mapping to first sequence
Merge pull request #212 from satta/orf-strand

Fix ORF finder strand output
fix documentation
fix max number of bitshift places for 32 bit
update 32 bit info map
Merge pull request #213 from Garonenur/32bit_issues

32bit issues
do not override error message
Merge pull request #215 from Garonenur/wrong_error

do not override error message
gt encseq info:
tests and bugfix for n50 values