Readdbc

- Project was converted into a R package
- Now it can be installed with devtools::install_github("danicat/read.dbc")
- Added documentation
- Minor fixes and code reorganization

- Fork of the code available on https://github.com/eaglebh/blast-dbf.
- Fixed the code to work with standard input/output redirection.
- Split the core blast code (blast.c) from the dbc2dbf code (dbc2dbf.c).
- Added conditional compilation to shared library (.so) or command line.
- Note: the original test.pk decompression test is broken in this version because it has no header (as opposed to a .dbc file).