Client side refactor

[jesusgn90]

Hello team, this PR is a first approach of #797

Main changes

• This PR mainly changes public/ folder structure.
• Removes outdated names such osseclog
• Splits each controller into separated files
• Migrates services and some controllers to ES6 class paradigm
• Optimizes some lines of code
• Removes some unused dependencies
• Reduces the rootScope usage
• Adds comments to multiple functions (we have still uncommented functions)
• Removes a check from the Logger initialization regarding to plugins/ folder because it's no longer needed. This allow us to run again the app under plugins folder while developing.

Note 1: Using classes instead anonymous functions will help us to future framework migration, usability, code maintenance, readability ...

Note 2: this PR should be merged ASAP due to structure changes, this way we can avoid future conflicts in further PRs.

Note 3: internal logic has not been modified, this PR modifies lot of files but it doesn't change current logic.

Regards,
Jesús

[JuanjiJG]

This PR would be a really good starting point for new big features such as the Management > Configuration redesign.

Amazing work @jesusgn90! 😄

[havidarou]

LGTM! Amazing work!!