when the Sender cannot complete an action, add information about any possible exception that was responsible.
add some convienence methods to Solo
Merge branch 'master' of git://github.com/locationlabs/robotium into HEAD

Conflicts:
	robotium-solo/src/main/java/com/jayway/android/robotium/solo/Solo.java
Merge branch 'master' of https://github.com/locationlabs/robotium
Merge commit '827ba69e67f6f8c98cec2f166ea1c60acd63f15e'