Merge pull request #549 from sanketio/develop

Fixed hide upload filter for BuddyPress Activity
check for isset
fix undefined warning
add template update admin notice
version update v3.7.3
update readme
reformat code for RTMediaViewCount.php
Added New hook  rtmedia_before_file_upload_process in RTMediaUploadFile.php
Merge pull request #550 from pranali333/develop

Added New hook  rtmedia_before_file_upload_process in RTMediaUploadFile....
Added Max and step attribute to number in function generate_number($attributes)
Merge branch 'develop' of https://github.com/rtCamp/rtMedia into develop
Merge pull request #551 from pranali333/develop

Added Max and step attribute to number in function generate_number
Fixed global album list in select box
Merge branch 'develop' of https://github.com/rtCamp/rtMedia into develop