Support wildcards '*' in package name.

[mmathieum]

One would use this command to get all Google apps logs:

pidcat.py com.google.*

One would use this command to get all AOSP apps logs:

pidcat.py com.android.*

One would use this command to get all ActionBarSherlock Sample apps logs:

pidcat.py com.actionbarsherlock.*

Thanks.

[marekdef]

yes great thing to add!

[vegetablesalad]

This would be great