Add support for dx 1.8 library
Merge pull request #7 from bkerler/master

Add support for dx 1.8 library
core: reformat code
core: use SSA representation for instruction arguments
update dependencies, add coveralls badge
use spock framework for unit tests
core: fix 'if' detection
core: fix basic block initial id
core: fix variable rename
core: inline 'cmp' instruction
core: fix method inline
core: fix 'break' detection in loop
fix issues reported by Coverity
core: refactor attribute storage