* In blocking mode, it behaves the same as BorrowCpus
* In async:
    - N > 0 borrow idle CPUs and then create global requests for the rest
    - N == 0 removes previous requests

* types.c now returns error if needed
* A warning is emitted if the type cannot be parsed

* Both DLB_ARGS and dlb_args from API are parsed, the latter takes precedence
* A warning is emitted every time a deprecated variable is parsed (LB_*)
* A warning is emitted if there are unrecognized flags in DLB_ARGS

See #61

See #61

See #61

See #61

Intel compiler does not compile otherwise

GCC 4.3 does not seem to accept those.

Close #52

Fix #68

Remove _ext attribute of some functions
Regroup functions by functionality