Added TextBuddy project into repository

The TextBuddy Java project has been added to the repository; the bug in
the "delete" function has been fixed before importing.
Made changes according to TA's feedback

Made changes based on Huang Da's suggestion: Extract the
Scanner.getNextLine() call into another method.
Added "sort" feature

TextBuddy can now sort text entries.
After this I will switch to Test Driven Development approach.
Temporary verision [suspect testing issue]

Because now TextBuddy is not a static class anymore, Junit test can't
work.
Revert "Added "sort" feature"

This reverts commit 5af0b2ee3e5329f1a47c8047a835204140e92b3b.
Revert "Revert "Added "sort" feature""

This reverts commit 89173132087e160e0087dc6badb35119917bae71.
Revert "Temporary verision [suspect testing issue]"

This reverts commit 4da89b5e2c0295ca813696851e5f4d4699d53805.
Fixed an issue with
Made a few variables global static for easier JUnit testing
Added first test case on "clear" function
Added test case / separate files into packages
Removed old files after making packages
Renamed a test case
Added new test case / fixed a bug when loading file
Added test cases for "search"
Renamed a test case
Added new test case / improved "search"