Change name reported by bin/detect to "Python TA-Lib"
Change name reported by bin/detect to "Python TA-Lib"

Since currently it outputs "Python", which results in the detected buildpack
name being the same as the Python buildpack this is used alongside.

Changing this to a unique name makes the build output easier to debug,
since it means the log sections more clearly map back to each buildpack.

Before:

```
-----> Python app detected
...
-----> Python app detected
...
```

After:

```
-----> Python app detected
...
-----> Python TA-Lib app detected
...
```
numrut/heroku-buildpack-python-talib