adds support for new compilers

[wideglide]

This accompanies the proposed changes to BinKit for new compiler versions.

• modifies regex in tiknib/utils.py to match any version of gcc/clang
• adds config/path_variables.py to enable ease of use. note: path_variables.py was written to work in Bash and Python universally.
• fixes a problem with the ase18 dataset and the coreutils debug information which caused all v6.5 functions to be discarded.
• adds tablulate to print out a formated ROC table.
• adds -P+ to enable compressing the IDA Pro databases. Saves a lot of storage space for this massive dataset! For example objdump reduces from 48M to 6M.

6.8M Dec  2  2018 /tmp/notpacked/binutils-2.30_clang-7.0_arm_64_O0_objdump.elf
 48M Jan 28 10:43 /tmp/notpacked/binutils-2.30_clang-7.0_arm_64_O0_objdump.elf.i64
6.8M Dec  2  2018 /tmp/packed/binutils-2.30_clang-7.0_arm_64_O0_objdump.elf
6.2M Jan 28 10:41 /tmp/packed/binutils-2.30_clang-7.0_arm_64_O0_objdump.elf.i64

[0xdkay]

Thanks for your contribution, @wideglide ! I have reviewed the code, and it does not seem to produce a problem. Could you add config/path_variables.py to this commit so that I can run and check the commit? (think it's missing)

[0xdkay]

I checked the code, and it ran successfully without a problem. Just merged. Thanks @wideglide !