Disk utilization

Add method to update array of values for each disk
Add method to calculate top disks for selected attrs
Add method to render partition layout for top disks
Disk utilization

Update disk bars width dynamically, and handle resize.
Fixes #270

Update buildout to get third party js libraries during deployment.
Fixes #273

Remove third-party js libraries from the repo.
Merge branch 'master' into issue#217_disk_widget
Fixes #277

Add API support for ldap service
Fixes #277

Update buildout and prepdb for ldap service support
Fixes #277

Add low level code for ldap service
Fixes #277

Add webui support for ldap service.
Disk utilization

Render disk activity only if widget is maximized
Disk activity

Change samples to 600, and frequency to 1 sec
Display reads_completed and writes_completed
Disk utilization

Display data read/written
Merge branch 'issue#273' of https://github.com/schakrava/rockstor-core into schakrava-issue#273
Disk utilization

Add tick formatter for time on x axis for graphs
Add wrapper div for graphs so that resize can empty the wrapper div, so
that legends are removed properly.
Disk utilization

Set selected disk
Disk utilization

Set handler for disk select, dont use events since it overrides base
class events.
Remove lib from gitignore as we need that directory to store third-party
javascript libraries during deployment
Delete unused css filed
Merge branch 'issue#273' of github.com:schakrava/rockstor-core into schakrava-issue#273
Remove readme file from lib