Array key check added

Fixed an error that is triggered when `$entry['info']` doesn't exist. It's showing up on 3.0.4 and earlier under certain conditions.
Merge pull request #100 from bradberger/patch-2

Array key check added
Merge pull request #104 from rmdstudio/master

Implementation of Mentions tagging
Merge pull request #105 from rmdstudio/master

removed the com_content record from the components table
Merge pull request #106 from rmdstudio/master

Bug fixes
Merge pull request #107 from rmdstudio/master

Prevents invalid usernames to be used as mentions
Merge pull request #108 from rmdstudio/master

Notification emails are now working.
Merge pull request #109 from rmdstudio/master

Minor bug fixes
Merge pull request #110 from rmdstudio/master

numbers can now be included in search terms
Merge pull request #111 from rmdstudio/master

Further improvements in tags
Merge pull request #112 from rmdstudio/master

New feature added
Merge pull request #113 from rmdstudio/master

Improved the design of add follower and leadable
Merge pull request #114 from rmdstudio/master

Fixed mentions notifications
Merge pull request #115 from rmdstudio/master

commented out mention notifications just for now
Fix docblock issues
Merge pull request #116 from NicholasJohn16/master

Fix docblock issues
Merge pull request #117 from rmdstudio/master

Improved notifications
Merge pull request #118 from rmdstudio/master

Some refactoring done to make the method names more friendly
Merge pull request #119 from rmdstudio/master

Bug fixes
Merge pull request #120 from rmdstudio/master

improved the hyperlink regex