Added sample-parsing to 'Biocaml_vcf'
Restructured 'Biocaml_vcf' -- now it's hopefuly more readable
Dropped redundant type annotations in 'Biocaml_vcf'
Merge pull request #112 from superbobry/v0.3-dev

Samples support in 'Biocaml_vcf'
Filename.Infix: change </> to /

Closes #83.
.gitignore: update for OMake instead Oasis
Fasta: remove pedantic_with

It's not used anywhere except a test, and it's definition was not
particularly useful.
Fasta.Tags: remove 'common' type by merging into t
Fasta.Tags: inline char_sequence definition
fasta.mli: factor raw_item definitions to their own section
App_random: do minor code clean-up
Fasta.Transform: slight cleanup of raw_item parsers

Eliminate use of Lines.Transform.make as requested in #73.
Fasta: all whitespace lines now treated as empty lines
Fasta: parsers now enforce `max_items_per_line
Fasta: add position information to more errors
Merge branch 'v0.3-dev' of github.com:biocaml/biocaml into v0.3-dev
intro.txt: fixed name of Chr module
chr.mli: doc fixes
replace internal Stream with CFStream library
move Set, Map, Hashtbl stream converters to CFStream

Also, finish up removal of Biocaml_stream, which should have been done
in d743820efeb67839db86865c526f4281e1a49c87. Somehow that commit didn't
fail, probably because I didn't do a distclean.