Added astor as dev prereq
Merge remote-tracking branch 'upstream/master'
added break and continue
fixed a bug and added tests
Merge remote-tracking branch 'upstream/master'
Builtins fix for 2 and 3, tests aswell
Added Twisted example.
Merge branch 'master' into pr/208
tell flake8 to shut up
Merge branch 'master' into pr/209
add tumblr printer
set the value of empty hy expression to []
changed try to testing for an empty list for legibility (as suggested by paultag), also added to authors
changed macro to ignore empty trees and made compiler do the substitution work
whitespace fix
Merge branch 'master' into pr/197