fix(README+deps): better subtext + rename target

* catchier title for dev diary episode 1
* fixed target name for clean, which was 'clean-api', but should have
  been 'clean-all-api'

Author: Byron

README.md

@@ -30,7 +30,7 @@ Click the image below to see the playlist with all project related content:
 
 Each episode sums up one major step in project development:
 
-* [Episode 1](http://youtu.be/2U3SpepKaBE): generating Rust APIs
+* [Episode 1](http://youtu.be/2U3SpepKaBE): How to write 78 APIs in 5s
 
 # Build Instructions
 

src/mako/deps.mako

@@ -127,7 +127,7 @@ ${api_clean}:
 % endfor
 % endfor
 
-clean${agsuffix}: ${space_join(1)} docs-clean${agsuffix}
+clean-all${agsuffix}: ${space_join(1)} docs-clean${agsuffix}
 cargo${agsuffix}: ${space_join(2)}
 publish${agsuffix}: | gen-all${agsuffix} ${space_join(4)}
 gen-all${agsuffix}: ${space_join(0)}