jq 1.4 is in Debian

jq 1.4 is in Debian, please see https://tracker.debian.org/pkg/jq
Merge pull request #483 from else/master

jq 1.4 is in Debian
Fix #484, try/catch syntax has conflicts
Fix bison empty rule warnings (#433, partial fix)
Added library system with -l, -L, and JQ_LIBRARY_PATH
Handle a few edge cases, better error handling.
Fixing error messages.
Better bounds checking, proper handling of missing $HOME

Created util.[ch] to hold common utilities.
Styling for library system
Sketch of module system
WIP