[FIX] Changed behaviour for hostToVirtualPosition, when host pos is greater or equal to the length of the host.
[DOC] Minor changes.
[DOC] GFF I/O: fixed the dox
[API] GFF I/O: throw ParseError instead of runtime_error, added extension .gff3
Merge pull request #743 from esiragusa/fix/gff_io

Small GFF I/O fixes
[FIX] Yara: fixed assertion on DP errors
replace dddoc with placeholder
[INTERNAL,DOC] remove more ddoc (hopefully last bits)

this removes ddoc that was incorrectly started with /* instead of /**

last commit:

```sh
for FILE in $(grep -l -R -E "^\.\.[^\.]+" apps include tests); do awk '$1 == "/*" { INCOMMENT = 1}; ($1 ~ /^\.\.[^\.]+/) && (OUTPUTOFF != 1) { print "_DDDOC_PLACEHOLDER"; OUTPUTOFF = 1; next }; $NF == "*/" { OUTPUTOFF = 0; INCOMMENT= 0
}; OUTPUTOFF != 1 { print }' $FILE > ${FILE}.new ; done

for FILE in $(find ./ -name "*.new"); do mv $FILE $(echo $FILE | sed -e 's/\.new//g'); done
```

this commit (plus some manual restoring of false positives and repeated calls) :
```sh
for FILE in $(ack -l DDDOC_PLACEHOLDER); do \
perl -0777 -i -pe 's|[\n]*\/\*[^\*]*\_DDDOC\_PLACEHOLDER[^\*]*\*\/[\n]*|\n\n|gs' $FILE; \
done
```
[FIX] Fixes compiler warnings.
[FIXED-#731] Fixes seed type issue for seed sets.
[FIX] Motif Finding: removed old demos and unused includes of find_motif.h
Merge pull request #745 from h-2/removeMoreDDDOC

Remove more dddoc
Merge branch 'develop' of github.com:seqan/seqan into release/fix/731
Merge pull request #730 from rrahn/release/fix/js_projection

[FIXED-#531] Fixes right-based projection.
[FIXES-#591] Fixes wrong source includes.
Merge pull request #748 from rrahn/release/fix/issue591

[FIXES-#591] Fixes wrong source includes.
[FIX] Fixes compiler warnings for comparison of different types.
[INTERNAL] Minor cosmetic change in demo.
Merge pull request #747 from rrahn/release/fix/731

[FIXES-#731] Fixes seed type issue in seed sets.
Merge pull request #750 from rrahn/release/fix/interval_io

[FIX] Fixes compiler warnings for comparison of different types.