Use symfony_env_* variables to tail logs

Right now the log tail is hardcoded to prod.log and dev.log, which is not always the desired behaviour. Using the symfony_env_* variables seems more appropiate
Merge pull request #405 from acasademont/patch-1

Use symfony_env_* variables to tail logs
Prepare 2.3.0 release
Bump version to 2.3.1.dev
set symfony environment prior calling composer install
updated spec file
Merge pull request #412 from abarani/composer-env

set symfony environment prior calling composer install
Add web_path variable
Merge pull request #415 from robertobermejo/issue_414

Add web_path variable
Add license to gemspec

Fix #408
human readable timestamp on db backups
Merge pull request #418 from tiagojsag/backup_file_name

human readable timestamp on db backups
Added backup task for the shared folder
Spec for shared folder task. New gem dependency on fakefs
Merge pull request #420 from peterjmit/shared-folder-backup

Added backup task for the shared folder
Add missing backup_path definition for symfony 1
Merge pull request #421 from real-chocopanda/fix-database-tasks

Add missing backup_path definition for symfony1
Add variable to set options of dump-autoload action
Merge pull request #428 from postal/enhance-options

Enhancement on configuration options
assets install step disappeared ??

deleting logger

set assets_install to false