warn user when an apis is not available
generating less code for the availability checks
nits
upgrade to the latest idls
remove some files
Merge pull request #94 from financeCoding/complete_parser_1

completed parser with tests
Merge branch 'master' into missing-api
Merge pull request #95 from dart-gde/missing-api

Missing api
set a min version for parsers
Merge pull request #96 from dart-gde/upgrade-idl

Upgrade idl