[Lazarus] SynMemo will be deprecated - Use SynEdit instead

[Martin Frb]

For general info:

In Lazarus 1.5 SynMemo will be deprecated. please read here:
http://wiki.lazarus.freepascal.org/Lazarus_1.6.0_release_notes#SynMemo_is_now_Deprecated

SynMemo can be used in all cases. So their is no need to have both.

It is recommended not to use SynMemo in 1.4. This will only mean you 
have to replace it in future.

The 2 extra methods from SynEdit will be available on SynEdit in Lazarus 
1.4. They have the same warnings as describe in the linked page.