[INTERNAL] Removing superflous global namespacing.
[DOC] Adding "using namespace seqan" to demos.
[DOC] Removing "seqan::" from demos.
[DOC] Normalizing usage of namespace in demos.
[NOP,DOC] Normalizing whitespace in demos.
[NOP] Converting more demos to new include format.
[DOC] Replacing FRAGMENT by //![] in demos.
[DOC] Removing trailing lines in demos.
Merge branch 'develop' of git://github.com/seqan/seqan into feature/fix-namespacing

Conflicts:
	demos/tutorial/bam_io/example3.cpp
	demos/tutorial/bam_io/solution7.cpp
	demos/tutorial/bed_io/example1.cpp
	demos/tutorial/bed_io/solution1.cpp
	demos/tutorial/bed_io/solution2.cpp
	demos/tutorial/bed_io/solution3.cpp
	demos/tutorial/gff_io/example1.cpp
	demos/tutorial/gff_io/solution1.cpp
	demos/tutorial/gff_io/solution2.cpp
	demos/tutorial/gff_io/solution3.cpp
	demos/tutorial/indexed_fasta_io/solution1.cpp
	demos/tutorial/vcf_io/example1.cpp
	demos/tutorial/vcf_io/solution1.cpp
	demos/tutorial/vcf_io/solution2.cpp
	demos/tutorial/vcf_io/solution3.cpp
Merge pull request #759 from holtgrewe/feature/fix-namespacing

Normalizing demo code.