Remove Chaiscript from Headers
Merge pull request #50 from da2ce7/chai_work

Remove Chaiscript from Headers (now only included in .cpp files).
Tidy up buildwrappers.sh for *.hpp
Include chaiscript (v4 & v5) headers into source as includes.
Change configure.ac to select chaiscript version based on compiler.
Update linux docs.
Remove chaiscript as pkg dependency.
Add chai headers for tarball dist. Mod debian rules.
Fix flag variable for tarball and out-of-src builds.
clang C++11 logic for configure.ac. Removed redundant clang flags.