Removed draft folder
Changed return value of BaseIO.read() to a list of blocks
Updated tests and docs
Bumped version number to 0.3.0dev
read_all_blocks() method for IOs dealing with multiple blocks (instead of overriding read())
Merge pull request #24 from rproepp/read_semantics

0.3.0: New read() semantics
write() method redirects a sequence of blocks to write_all_blocks() method, if present
Merge pull request #25 from rproepp/write_semantics

write() method semantics for multiple blocks in one file.
Small bug in units for AxonIO