Add large HTML file for testing snippet insertion
remove content-length header when inserting snippet
Refactor server spec to allow for large HTML file tests to fails
Add hasOwnProperty check before trying to delete
Add proxy specs
Exclude trailing slashes on proxy argument from command-line
Remove redundant function
Remove redundant function
Add specs for external server + proxy (not suitable for CI :( )
Cleanup
Split server & script injecting specs
Add server message spec
Add missing messages spec
Add missing messages spec