How can I install a sublimetext3 package manually, without the package control. I am trying to fix a bug in an existing package, therefore I need a way to test my changes.
what are the naming conventions to be followed when naming the zip file? Where do I place it? what other configurations I have to do?
Download the ZIP, and then place it in your Packages directory which can be found by doing Sublime Text -> Preferences -> Browse Packages...
what are the naming conventions to be followed when naming the zip file? Where do I place it? what other configurations I have to do?
This really depends on the specific package you are downloading. For some packages, you can name it whatever you want. For others, the name has to be exact. If you are downloading these packages manually from GitHub, I urge you to read the documentation in the README. They usually provide instructions for manual installation. For example, if you wanted to download the Spacegray theme manually, it tells you to download the ZIP, unzip the folder, and rename it to Theme - Spacegray.