Use $HOME variable if it exists

Signed-off-by: Ismail Dönmez <ismail@i10z.com>

README.md

@@ -7,7 +7,7 @@ libgourou is a free implementation of Adobe's ADEPT protocol used to add DRM on
 Architecture
 ------------
 
-Like RMSDK, libgourou has a client/server scheme. All platform-specific functions (crypto, network...) have to be implemented in a client class (that derives from DRMProcessorClient) while server implements ADEPT protocol.
+Like RMSDK, libgourou has a client/server scheme. All platform specific functions (crypto, network...) have to be implemented in a client class (that derives from DRMProcessorClient) while server implements ADEPT protocol.
 A reference implementation using cURL, OpenSSL and libzip is provided (in _utils_ directory).
 
 Main functions to use from gourou::DRMProcessor are:
@@ -25,9 +25,9 @@ You can import configuration from (at least):
   
 Or create a new one. Be careful: there is a limited number of devices that can be created by one account.
 
-ePub files are encrypted using a shared key: one account / multiple devices, so you can create and register a device into your computer and read downloaded (and encrypted) ePub file with your eReader configured using the same AdobeID account.
+ePub are encrypted using a shared key: one account / multiple devices, so you can create and register a device into your computer and read downloaded (and encrypted) ePub file with your eReader configured using the same AdobeID account.
 
-For those who want to remove DRM without adept_remove, you can export your private key and import it within [Calibre](https://calibre-ebook.com/) and its DeDRM plugin.
+For those who want to remove DRM without adept_remove, you can export your private key and import it within [Calibre](https://calibre-ebook.com/) an its DeDRM plugin.
 
 
 Dependencies
@@ -88,7 +88,7 @@ First, add libgourou.so to your LD_LIBRARY_PATH
 
     export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$PWD
 
-You can optionally specify your .adept directory
+You can optionaly specify your .adept directory
 
     export ADEPT_DIR=/home/XXX