Inital version of serial blosc interface. Internal threading is currently disabled.
Restoring internal threading functionality. Only blosc_getitem is not working.
Fixing compressor format issue. 
Fixing blosc_free_resources issue.
Fixing blocksize is old API.
Fixing blosc_getitem to allow it to be used with sblosc changes.
Giving our version a (hopefully) unique version number.
Fixing build for windows. Needs to have all variables decleared at the 
beginning of a block for C code.
Spelling and variable name changes. 

Reverting version number to 1.4.2.dev
Adding back pool of threads. Create the pool with blosc_init before 
calling blosc_compress, just as before. The new sblosc api will not use
a pool of threads.
Fixing C99 compatibility warnings.
Fixing issue with global threads setting.
Blosc filter should call blosc_init.
Merge pull request #66 from sideeffects/serial_blosc

Implemented contexts so that Blosc can be called from already multithread code without the global lock.  That allows simultaneous use of the Blosc library from the external threads.