Merge pull request #729 from NileemaJadhav/HR-14-fixes

--Fixes for extension install/unistall
Update CiviHR Version (1.4-beta1) and Release Date (2014-09-24)
doc fixes
Merge pull request #730 from yashodha/fixes

doc fixes
Merge pull request #731 from yashodha/1.4

Update CiviHR Version (1.4-beta1) and Release Date (2014-09-24)
--Notice fixes, handle bug for absence report on dasboard