* change the repo fetch script to recognize candidate versions such as flutter-1.17-candidate.3. Originally the script only accepted branches such as v0.7.3 as valid engine branches.
* addressing reviewer comments: changing the release regular expression
* changing felt script to fetch flutter
* changing the clone_flutter.sh code
* running integration tests with felt on cirrus. fetch framework in CI (not in local).
* only run cirrus tests on chrome. fix a comma in the flutter command path
* adding comments to public flags
* use local engine parameter for flutter pub get
* change flutter executable used for flutter drive command
* fix a cleanup issue. address comments. add toolException. enable web in flutter
* address reviwer comments. fix issue with local-engine
* address reviwer comments. fix issue with local-engine
* using engine/flutter/.dart_tools as clone directory. enabling clone script for local usage
* clean flutter repo with felt clean. add a flag to skip cloning the repo. always clone the repo even for local development, unless this flag is set
* fixing typos. updating readme for the new flag.
* fix directory error
* addressing reviewer comments
* script for fetching correct flutter version
* change cirrus yml for the script location
* change location of the script. Add it to tools
* cirrus still does not see the script. repeat path change from the previous step
* Looks like script worked correctly. do not change directory.
* change directory back to build root after scriot is run
* script runs ok. Still not able to find the bin directory. go all the way back
* still can't see the bin directory. carry the script content to cirrus.yml to debug better
* get the last commit id of the right repository
* content of the script worked in cirrus. call the script from tools
* cannot find the script under tools
* print the current path in the script to see why cirrus cannot see bin directory
* move to flutter path before running update packages
* tests run now. remove print outs
* error if the ENGINE_PATH is not set. exit the script
* addressing reviewer comments
* engine branch name on cirrus logs doesn't make sense
* fix typo
* change the directory of branch calculation
* remove extra logs
* addressing PR comments. Testing CIRRUS_CI env variable
* adding CIRRUS_CI check
