Lots of changes associated with structure of our project

[doyonghoon]

Changes

• This PR leads to use BaseActivity and BaseFragment to follow DRY principle.
• The app will load list of colleges from our server and shows on the screen by utilizing retrofit and gson.
• MajorParser and UnivParser are replaced by ApiProvider class, however not removed from the package.

This PR contains such additional libraries.

• Gson: is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object.
• Retrofit: Type-safe HTTP client for Android.
• Butterknife: Field and method binding for Android views which uses annotation processing to generate boilerplate code for you.
• Glide: is a fast and efficient open source media management and image loading framework.

[banhathome]

basic-structure is a couple of commits behind parsing. You should rebase or merge to fix this

[banhathome]

You should add .idea to .gitignore.

You can probably just append your current .gitignore with this: https://github.com/github/gitignore/blob/master/Global/JetBrains.gitignore

[doyonghoon]

oh, I already added .idea to .gitignore L44-L64, is it not working for you?
@chrisngobanh

.idea/
# if you remove the above rule, at least ignore the following:

# User-specific stuff:
# .idea/workspace.xml
# .idea/tasks.xml
# .idea/dictionaries

# Sensitive or high-churn files:
# .idea/dataSources.ids
# .idea/dataSources.xml
# .idea/sqlDataSources.xml
# .idea/dynamic.xml
# .idea/uiDesigner.xml

# Gradle:
# .idea/gradle.xml
# .idea/libraries

# Mongo Explorer plugin:
# .idea/mongoSettings.xml

[banhathome]

@doyonghoon Oh I didn't see that! You seem to still be committing stuff in your .idea/ directory. The .gitignore will start working when you remove your .idea/ directory.

EDIT: NEVERMIND IGNORE THIS

[doyonghoon]

i have merged commits left behind from parsing branch, now this PR is ready to be merged without any conflicts.