Merge branch 'hotfix/grammar'
Update popup.html
Add bold to Parameter name
Fix html problem.
Add a separator for arguments after #
Add onInstall method, called when the extension is installed for the first time.
Work on onInstall
Updating icon

with a better one (more readable and cool)
Add post_install.html file.
Updating title for page action

Better describe the scope of the extension
Show new tab after installation.
Updating Copyright

because it's just you and me
Adding post_install.html

to provide welcome and few instructions
Merge branch 'release/v0.5'