[Nereid Project] Migration to 2.6 #1246

* Migration of nereid project with test cases

Task ID : #1246
Merge branch 'release/2.4.0.1'
Add .travis.yml for CI
Add blinker as dependency
Use TableHandler not Interface
Merge pull request #15 from sharoonthomas/develop
Add a README
Release version 2.6.1.0
Merge branch 'release/2.6.1.0'
Merge branch 'release/2.6.1.0' into develop
Nereid Project Documentation #1352

Added content and screenshots about Nereid Project into Documentaion

Task-Project-7/task-1352
Issue ID- 48003
Merge pull request #17 from simmianand/feature/task-1352

Nereid Project Documentation #1352
Add fabfile to deploy documentation
Template changes of myopenlabs to nereid project #1492

* On ui in my-tasks, its possible to drag task from one state to other
* Possible to edit task brief and description, form task list only
  without going to task page.
* Task color should show its state.

Issue ID: 94001
Merge pull request #18 from simmianand/feature/task-1492

Template changes of myopenlabs to nereid project #1492
Minor change in global-timesheet.jinja template #1246

* On global timesheet 'Calender Tab'-timesheet lines and weekly anaysis
  was also active, now issue resolved.
Merge pull request #19 from simmianand/feature/task-1246

Minor change in global-timesheet.jinja template #1246
Modified Nereid Project documentation #1352
Merge pull request #20 from simmianand/feature/task-1352

Nereid Project documentation #1352
Remove the directory contents before building docs