blast wrappers

Blast wrappers for caching the output of blast searches.

These tools will search for any existing cached output and will return that if it exists. If not, it will pass all the arguments to the blast tools found in /usr/bin/*blast*.

The output in stored/cached into /tmp/blastCacheStore

    /tmp/blastCacheStore/
    └── 70d
        └── 35d
            └── 70d35d8c2c52155979a2ad66722ccc8c
                ├── errors.blast
                └── output.blast

The cache key (in the above example 70d35d8c2c52155979a2ad66722ccc8c) is created using md5 on the arguments passed to the blast tool (or, rather, to the wrapper) and the contents of the file (given by -query argument).

This works only if you add these wrappers to the PATH...

TODO

- cache location should be configurable (via env variables)
- use a store struct