check in generic triggers
improvement before scheduler integration and data trigger
scheduler should be working now
trigger system, with working time based trigger and hdfs data trigger
data trigger with ui
fix trigger plugin ui display
removed the feed back loop from trigger manager to agents
moved to separate trigger server
adding generic alert types
some bad bug in the previous version that doesn't take in flow parameter override.
lots of bug fixes
trigger manager in web server
Merge branch 'release-2.1' of github.com:azkaban/azkaban2 into triggerserver

Conflicts:
	README.md
	src/java/azkaban/executor/ExecutorManager.java
	src/java/azkaban/scheduler/ScheduleManager.java
fix executormanager only look at flow name to decide if a flow of a project is running
Merge branch 'master' of github.com:azkaban/azkaban2 into triggerserver
fixes to trigger scanners
removed unnecessary files
almost ready generic triggers
Merge branch 'master' of github.com:azkaban/azkaban2

Conflicts:
	src/java/azkaban/executor/ExecutorManager.java
	src/java/azkaban/scheduler/ScheduleManager.java
	src/java/azkaban/scheduler/ScheduleStatisticManager.java
	src/java/azkaban/utils/Emailer.java
	src/java/azkaban/utils/Utils.java
Fix update script for migrating from 2.0 to 2.1

* execution_logs has no primary key in 2.0
* Missing ";" breaks update scripts