add models for alerts
add api methods for creating and updating alerts
get alerts on getting info about queue
fix a bug with non initialized alerts collection
implement deletion of alerts
change strings to enums
Merge pull request #2 from pyeremenko/master

Implement alerts API
Merge pull request #3 from freeman1988/master

added nuspecs and pics
bump version (change icon in nuget)
Merge https://github.com/iron-io/iron_dotnet