add support & tests for (nonstandard!) e.g. 'logical*1' type declarations
match assumed_size_spec before explicit_shape_spec_list + tests for this
accept uppercase letters in R411 hex literals & ammend tests t0055* to test
accept backslash in char literal + tests t0327. 'program p' -> 'program t'
do not parse '1.' in '(1.le.i)' as a real literal constant + tests
merge branch 'master' of https://github.com/maddenp/ppp