add indigolog execution (both online and offline with Search() construct)
add gitignore
switch from exogenous actions to exogenous functions (of state)
adjust elevator example to use exogenous events
added ConGolog constructs (not tested yet)
fix wrong semantics of Conc
use generic python3 header
mark files executable
typo
reverse the order in Sequence.trans(), causes the program Sequence(Star(...),Test(...)) to work as expected
move test domains to separate files; add congolog tests; add math planner test
use proper names in __repr__()
fix error
blah
Merge branch 'indigolog'