Update INSTALL.md

INSTALL.md

@@ -32,7 +32,8 @@ For Mac/Linux users, you can skip the following manual installation steps and di
 ```python
 conda create -n calour python=3.5
 source activate calour
-conda install -c bioconda calour
+conda install -c bioconda calour       # if you want to just install calour
+conda install -c bioconda calour-full  # if you want to install calour and its optional dependencies
 ```
 
 ### Install the latest manually from github repository
@@ -105,11 +106,11 @@ pip install git+git://github.com/biocore/calour.git
 
 * Install the [phenotype-database](https://doi.org/10.6084/m9.figshare.4272392) calour interface:
 
-\(based on : [Hiding in Plain Sight: Mining Bacterial Species Records for Phenotypic Trait Information](http://msphere.asm.org/content/2/4/e00237-17) - Barberán et al. 2017\)
+  (based on : [Hiding in Plain Sight: Mining Bacterial Species Records for Phenotypic Trait Information](http://msphere.asm.org/content/2/4/e00237-17) - Barberán et al. 2017\)
 
-```
-pip install git+git://github.com/amnona/pheno-calour
-```
+  ```
+  pip install git+git://github.com/amnona/pheno-calour
+  ```
 
 * For metabolomics, also install the [GNPS](http://gnps.ucsd.edu/) calour interface:
   ```